View source for List of shipwrecks in April 1918

{{Short description|None}}
The '''list of shipwrecks in April 1918''' includes [[ship]]s sunk, foundered, grounded, or otherwise lost during [[April 1918]].
{{dynamic list}}
{{Calendar ToC}}

==1 April==
{{shipwreck list begin |date=1 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Ardglass|1918|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was torpedoed and sunk in the [[Irish Sea]] {{convert|7|nmi|km}} north east of [[Larne]], [[County Antrim]] by {{SMU|UC-31||6}} ({{navy|German Empire}}) with the loss of seven of her crew.<ref name=Ardglass>{{cite web |url=http://uboat.net/wwi/ships_hit/419.html |title=Ardglass |publisher=Uboat.net |access-date=3 December 2012}}</ref><ref name=NH33>{{cite web |url=http://www.naval-history.net/WW1LossesBrMS1918.htm |title= British Merchant Ships Lost to Enemy Action Part 3 of 3 - September 1917-November 1918 in date order |publisher=Naval History |access-date=25 January 2013}}</ref>
}}
{{shipwreck list item
|ship={{HMS|Falcon|1899|6}}
|flag={{navy|UK}}
|desc=The {{sclass2|C|destroyer|||1913}} collided with the trawler ''John Fitzgerald'' ({{flagcountry|UKGBI|civil}}) and sank in the [[North Sea]] off [[Bridlington]], [[East Riding of Yorkshire|Yorkshire]] ({{coord|54|07|45|N|0|22|10|E}}).<ref name=Falcon>{{cite web |url=http://www.ukdiving.co.uk/wrecks/wreck.php?id=192 |title=HMS Falcon |publisher=UK Diving |access-date=7 February 2013}}</ref>
}}
{{shipwreck list item
|ship={{ship||Lusitano|barquentine|2}}
|flag={{flag|Portugal}}
|desc=World War I: The barquentine was scuttled in the [[Atlantic Ocean]] off the [[Azores]] ({{coord|38|50|N|18|24|W}}) by {{SMU|U-155||6}} ({{navy|German Empire}}). Her crew took to the lifeboats but were not rescued.<ref name=Lusitano>{{cite web |url=http://uboat.net/wwi/ships_hit/3766.html |title=Lusitano |publisher=Uboat.net |access-date=27 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SMS|Saturn}}
|flag={{navy|German Empire}}
|desc=The ''[[Vorpostenboot]]'' was lost on this date.
}}
{{shipwreck list end}}

==2 April==
{{shipwreck list begin |date=2 April 1918 |sort=}}
{{shipwreck list item
|ship=''Ashmore''
|flag={{flag|Norway}}
|desc=During a voyage from [[São Vicente, Cape Verde|São Vicente]], [[Cape Verde]], to [[Saint John, New Brunswick|Saint John]], [[New Brunswick]], [[Canada]], the {{convert|219|ft|adj=on}}, 1,043-[[gross register ton]] three-[[Mast (ship)|masted]] [[barque]] was wrecked in the [[Bay of Fundy]] on the Dixon Rocks off [[Grand Manan]] between Long Ledge and Yellow Ledge.<ref>{{Cite web| url=http://wreckhunter.net/DataPages/ashmore-dat.htm |title=Ashmore | publisher=Hunting New England Shipwrecks |access-date=27 January 2021 }}</ref>
}}
{{shipwreck list item
|ship={{SS|Meaford|1903|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was sunk in the [[Atlantic Ocean]] by {{SMU|U-53||6}} ({{navy|German Empire}}) with the loss of all hands.<ref name=Meaford>{{cite web |url=http://uboat.net/wwi/ships_hit/7430.html |title=Meaford |publisher=Uboat.net |access-date=10 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SMS|Senator Sthamer}}
|flag={{navy|German Empire}}
|desc=The ''[[Vorpostenboot]]'' was lost on this date.
}}
{{shipwreck list item
|ship={{SS|Solway Queen|1883|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The coaster was torpedoed and sunk in the [[Irish Sea]] {{convert|7|nmi|km}} off [[Black Head, Wigtownshire]] by {{SMU|U-101||6}} ({{navy|German Empire}}) with the loss of eleven crew.<ref name=NH33/><ref name=SQ>{{cite web |url=http://uboat.net/wwi/ships_hit/5644.html |title=Solway Queen |publisher=Uboat.net |access-date=25 October 2012}}</ref>
}}
{{shipwreck list end}}

==3 April==
{{shipwreck list begin |date=3 April 1918 |sort=}}
{{shipwreck list item
|ship={{ship|Russian submarine|AG-11||2}}
|flag={{nowrap begin}}{{navy|Russian Empire}}{{nowrap end}}
|desc=[[World War I]]: The [[American Holland-class submarine|AG-class]] [[submarine]] was [[Scuttling|scuttled]] in the harbour at [[Hanko, Finland|Hanko]].
}}
{{shipwreck list item
|ship={{ship|Russian submarine|AG-12||2}}
|flag={{nowrap begin}}{{navy|Russian Empire}}{{nowrap end}}
|desc=World War I: The [[American Holland-class submarine|AG-class]] [[submarine]] was [[Scuttling|scuttled]] in the harbour at [[Hanko, Finland|Hanko]].
}}
{{shipwreck list item
|ship={{ship|Finnish submarine|AG-16||2}}
|flag={{nowrap begin}}{{navy|Russian Empire}}{{nowrap end}}
|desc=World War I: The [[American Holland-class submarine|AG-class]] [[submarine]] was [[Scuttling|scuttled]] in the harbour at [[Hanko, Finland|Hanko]].
}}
{{shipwreck list item
|ship={{HMS|E1}}
|flag={{Navy|UK}}
|desc=World War I: The [[British E-class submarine|E-class]] submarine was scuttled in the [[Gulf of Finland]] off the [[Harmaja]] Lighthouse.
}}
{{shipwreck list item
|ship={{HMS|E9}}
|flag={{Navy|UK}}
|desc=World War I: The [[British E-class submarine|E-class]] submarine was scuttled in the Gulf of Finland off the Harmaja Lighthouse.
}}
{{shipwreck list item
|ship=''Elina''
|flag={{flag|United States|1912}}
|desc=While the 8-[[gross register ton]] [[motor vessel]] – with no crew or cargo aboard – was under [[Towing|tow]] along with two [[scow]]s by the [[Launch (boat)|launch]] ''Chomley'' ({{flag|United States|1912}}), her [[Bow (ship)|bow]] stem pulled out and she broke free off the coast of [[Southeast Alaska]] {{convert|2|nmi}} southwest of [[South Vallenar Point]] ({{coord|55|25|35|N|131|51|00|W|name=South Vallenar Point}}). By the time ''Chomley'' dropped off the scows and returned to ''Elina'', ''Chomley'' was able to [[Marine salvage|salvage]] ''Elina''{{'}}s [[gasoline engine]], but otherwise ''Elina'' had become a [[total loss]].<ref name=alaskashipwreckse>[https://alaskashipwreck.com/shipwrecks-a-z/alaska-shipwrecks-e/ alaskashipwreck.com Alaska Shipwrecks (E)]</ref>
}}
{{shipwreck list item
|ship={{ship||Elsie Burdett|schooner|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[schooner]] was sunk in the [[Atlantic Ocean]] off the [[Canary Islands]], Spain ({{coord|44|38|N|24|28|W}}) by {{SMU|U-152||6}} ({{navy|German Empire}}). Her six crew took to the lifeboat but were not rescued.<ref name=EB>{{cite web |url=http://uboat.net/wwi/ships_hit/1920.html |title=Elsie Burdett |publisher=Uboat.net |access-date=26 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Sylvie|1917|2}}
|flag={{flag|France}}
|desc=World War I: The cargo ship was sunk in the [[Mediterranean Sea]] {{convert|120|nmi|km}} north east of [[Malta]] by {{SMU|UC-54||6}} ({{navy|German Empire}}).<ref name=Sylvie>{{cite web |url=http://uboat.net/wwi/ships_hit/7360.html |title=Sylvie |publisher=Uboat.net |access-date=20 December 2012}}</ref>
}}
{{shipwreck list item
|ship=Unknown
|flag={{flag|United States|1912}}
|desc=The scow sank at the [[Thames Shipyard]], [[New London, Connecticut]].<ref name=":0">{{cite web |url=https://research.mysticseaport.org/coll/coll001/ |title=Records of the T. A. Scott co. |date=20 May 2016 |publisher=mysticseaport.org |access-date=20 April 2021}}</ref>
}}
{{shipwreck list end}}

==4 April==
{{shipwreck list begin |date=4 April 1918 |sort=}}
{{shipwreck list item
|ship={{ship||Agatina|barquentine|2}}
|flag={{flagcountry|Kingdom of Italy|civil}}
|desc=[[World War I]]: the [[barquentine]] was shelled and sunk in the [[Mediterranean Sea]] off [[Sicily]] by {{SMU|UC-25}} ({{navy|German Empire}}).<ref name=Agatina>{{cite web |url=http://uboat.net/wwi/ships_hit/84.html |title=Agatina |publisher=Uboat.net |access-date=1 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMS|Bittern|1897|6}}
|flag={{navy|UK}}
|desc=The {{sclass|Avon|destroyer|2}} collided with {{SS|Kenilworth||2}} ({{flagcountry|UKGBI|civil}}) in the [[English Channel]] off the [[Isle of Portland]], [[Dorset]] and sank with the loss of all 63 crew.
}}
{{shipwreck list item
|ship={{HMS|C26}}
|flag={{Navy|UK}}
|desc=World War I: The [[British C-class submarine|C-class]] submarine was scuttled in the [[Gulf of Finland]] off the [[Harmaja]] Lighthouse to prevent her capture by German forces.
}}
{{shipwreck list item
|ship={{HMS|E8}}
|flag={{Navy|UK}}
|desc=World War I: The [[British E-class submarine|E-class]] submarine was scuttled in the Gulf of Finland off the Harmaja Lighthouse prevent her capture by German forces.
}}
{{shipwreck list item
|ship={{HMT|J&A}}
|flag={{navy|UK}}
|desc=The [[naval trawler]] was lost on this date.<ref name=Navy12/>
}}
{{shipwreck list item
|ship={{SS|Liberia|1887|2}}
|flag={{flag|France}}
|desc=World War I: The cargo ship was sunk in the [[Gulf of Genoa]] {{convert|62|nmi|km}} south east of the [[Îles d'Hyères]] ({{coord|42|04|N|7|02|E}}) by {{SMU|UC-35}} ({{navy|German Empire}}). Her crew survived.<ref name=Liberia>{{cite web |url=http://uboat.net/wwi/ships_hit/3590.html |title=Liberia |publisher=Uboat.net |access-date=7 December 2012}}</ref>
}}
{{shipwreck list item
|ship=''Orange''
|flag={{army|United States|1912}}
|desc=The US Army Corps of Engineers pipeline dredge was destroyed by fire in a canal near the [[Sabine River (Texas–Louisiana)|Sabine River]].<ref>{{cite web |url=https://books.google.com/books?id=1INAAQAAMAAJ&dq=US+Army+dredge+Orange%2C+1918&pg=PA2607 |title=Annual report of the chief of Engineers, U.S. Army, Corp of Engineers Year ending June 30, 1918 |year=1918 |publisher=Government Printing Office, Washington |via=Googlebooks |access-date=14 August 2019}}</ref>
}}
{{shipwreck list item
|ship={{SS|Sincerita|1877|2}}
|flag={{Flagcountry|Kingdom of Italy|civil}}
|desc=World War I: The cargo ship was sunk in the [[Mediterranean Sea]] ({{coord|36|17|N|14|48|E}}) by {{SMU|UB-52}} ({{navy|German Empire}}). Her crew survived.<ref name=Sincerita>{{cite web |url=http://uboat.net/wwi/ships_hit/5580.html |title=Sincerita |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship=Five unnamed vessels <!--source states seven, C26 and E6 accounted for above-->
|flag={{navy|UK}}
|desc=World War I: The [[submarine]]s were scuttled in the Gulf of Finland to prevent their capture by German forces.<ref name=Cherneyshev>{{Cite book |title=Погибли без боя. Катастрофы русских кораблей XVIII–XX вв. |trans-title=They died without a fight. Catastrophes of Russian ships of the XVIII-XX centuries |language=Russian |first=Alexander Alekseevich |last=Chernyshev |publisher=Veche |year=2012 |url=http://www.maxima-library.org/mob/b/389880?format=read }}</ref>
}}
{{shipwreck list end}}

==5 April==
{{shipwreck list begin |date=5 April 1918 |sort=}}
{{shipwreck list item
|ship={{HMS|C27}}
|flag={{Navy|UK}}
|desc=[[World War I]]: The [[British C-class submarine|C-class]] submarine was scuttled in the [[Gulf of Finland]] off the [[Harmaja]] Lighthouse prevent her capture by German forces.
}}
{{shipwreck list item
|ship={{HMS|C35}}
|flag={{Navy|UK}}
|desc=World War I: The [[British C-class submarine|C-class]] submarine was scuttled in the Gulf of Finland off the Harmaja Lighthouse prevent her capture by German forces.
}}
{{shipwreck list item
|ship={{ship||Camelia|barque|2}}
|flag={{flagcountry|Kingdom of Italy|civil}}
|desc=World War I: The [[barque]] was shelled and sunk in the [[Mediterranean Sea]] off [[Cap Caccia]] ({{coord|40|38|N|8|06|E}}) by {{SMU|UC-35||6}} ({{navy|German Empire}}).<ref name=Camelia>{{cite web |url=http://uboat.net/wwi/ships_hit/1063.html |title=Camelia |publisher=Uboat.net |access-date=7 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Cyrene|1888|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in [[Caernarfon Bay]] {{convert|15|nmi|km}} north of [[Bardsey Island]], [[Caernarfonshire]] by {{SMU|UC-31||6}} ({{navy|German Empire}}) with the loss of 24 of her crew.<ref name=NH33/><ref name=Cyrene>{{cite web |url=http://uboat.net/wwi/ships_hit/1524.html |title=Cyrene |publisher=Uboat.net |access-date=3 December 2012}}</ref>
}}
{{shipwreck list end}}

==6 April==
{{shipwreck list begin |date=6 April 1918 |sort=}}
{{shipwreck list item
|ship={{ship|French Q-ship|Madeleine III||2}}
|flag={{navy|France}}
|desc=[[World War I]]: The [[Q-ship]] was torpedoed and sunk in the [[Mediterranean Sea]] off the coast of [[French Algeria|Algeria]] ({{coord|37|27|N|9|53|E}}) by {{SMU|UB-50||6}} ({{navy|German Empire}}) with the loss of seventeen of her twenty crew. The survivors were taken as [[prisoners of war]].<ref name=Madeleine3>{{cite web |url=http://uboat.net/wwi/ships_hit/3809.html |title=Madeleine Iii |publisher=Uboat.net |access-date=9 November 2012}}</ref>
}}
{{shipwreck list item
|ship=''Madonna delle Grazie B.''
|flag={{flagcountry|Kingdom of Italy|civil}}
|desc=World War I: The sailing vessel was sunk in the [[Ionian Sea]] by {{SMU|UC-52||6}} ({{navy|German Empire}}).<ref name=MBG>{{cite web |url=http://uboat.net/wwi/ships_hit/3811.html |title=Madonna delle Grazie B. |publisher=Uboat.net |access-date=18 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Ministre de Smet de Naeyer||2}}
|flag={{flag|Belgium}}
|desc=World War I: The cargo ship struck a mine and sank in the [[North Sea]] {{convert|45|nmi|km}} north of the ''[[Dogger Bank Lightship]]'' ({{flagcountry|UKGBI|government}}) with the loss of twelve of her 29 crew.<ref name=Times090418a>{{Cite newspaper The Times |title=Imperial and Foreign news items. |date=9 April 1918 |page=5 |issue=41759 |column=E }}</ref>
}}
{{shipwreck list item
|ship=''HMML 421''
|flag={{navy|UK}}
|desc=The motor launch was lost on this date.<ref name=Navy22/>
}}
{{shipwreck list item
|ship=''Sterne''
|flag={{flag|Netherlands}}
|desc=World War I: The sailing vessel was stopped in the North Sea {{convert|60|nmi|km}} off [[Jæren]], [[Rogaland]], Norway by {{SMU|U-19|Germany|6}} ({{navy|German Empire}}). ''U-19'' intended to sink her but lost sight of her. ''Sterne'' came ashore at [[Utsira (island)|Utsire]], Rogaland and was a total loss.<ref name=Sterne>{{cite web |url=http://uboat.net/wwi/ships_hit/5777.html |title=Sterne |publisher=Uboat.net |access-date=27 September 2012}}</ref>
}}
{{shipwreck list end}}

==7 April==
{{shipwreck list begin |date=7 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Boscastle|1912|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The [[collier (ship type)|collier]] was torpedoed and sunk in [[St. George's Channel]] {{convert|14|nmi|km}} north north west of [[Strumble Head]], [[Pembrokeshire]] by {{SMU|U-111||6}} ({{navy|German Empire}}) with the loss of eighteen crew.<ref name=NH33/><ref name=Navy12/><ref name=Boscastle>{{cite web |url=http://uboat.net/wwi/ships_hit/875.html |title=Boscastle |publisher=Uboat.net |access-date=26 October 2012}}</ref>
}}
{{shipwreck list item
|ship=''Catriena''
|flag={{flag|Netherlands}}
|desc=World War I: The sailing vessel was sunk in the [[North Sea]] {{convert|58|nmi|km}} south west of [[Egersund]], [[Rogaland]], Norway ({{coord|58|04|N|4|14|E}}) by {{SMU|UB-73||6}} ({{navy|German Empire}}). Her crew survived.<ref name=Catriena>{{cite web |url=http://uboat.net/wwi/ships_hit/1173.html |title=Catriena |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Highland Brigade|1901|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[cargo liner]] was sunk in the [[English Channel]] {{convert|6|nmi|km}} south by east of [[St. Catherine's Point]] ({{coord|50|35|N|1|14|W}}) by {{SMU|UC-71||6}} ({{navy|German Empire}}). Her crew survived.<ref name=HB>{{cite web |url=http://uboat.net/wwi/ships_hit/2844.html |title=Highland Brigade |publisher=Uboat.net |access-date=27 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Port Campbell|1904|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Atlantic Ocean]] {{convert|115|nmi|km}} west south west of the [[Bishop Rock, Isles of Scilly]] by {{SMU|U-53||6}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=PC>{{cite web |url=http://uboat.net/wwi/ships_hit/4870.html |title=Port Campbell |publisher=Uboat.net |access-date=10 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Rye|1914|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The coaster was torpedoed and sunk in the English Channel {{convert|19|nmi|km}} north west by west of [[Cap d'Antifer]], [[Seine-Inférieure]], France ({{coord|49|57|N|0|07|W}}) by {{SMU|UB-74||6}} ({{navy|German Empire}}) with the loss of four of her crew.<ref name=NH33/><ref name=Rye>{{cite web |url=http://uboat.net/wwi/ships_hit/5269.html |title=Rye |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{ship|Italian tanker|Sterope||2}}
|flag={{navy|Kingdom of Italy}}
|desc=World War I: The tanker was shelled and sunk in the Atlantic Ocean off the [[Azores]], Portugal ({{coord|38|44|N|18|09|W}}) by {{SMU|U-155||6}} ({{navy|German Empire}}).<ref name=Sterope>{{cite web |url=http://uboat.net/wwi/ships_hit/5778.html |title=Sterope |publisher=Uboat.net |access-date=27 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{Ship||Vera Cruz|ship|2}}
|flag={{flag|United States|1912}}
|desc=The [[sailing ship]] was wrecked at [[Tampico, Tamaulipas]], Mexico.<ref>{{cite web |title=Vera Cruz |url=https://wrecksite.eu/wreck.aspx?208778 |website=wrecksite.eu |access-date=2 July 2022}}</ref>
}}
{{shipwreck list end}}

==8 April==
{{shipwreck list begin |date=8 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Bengali|1901|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was torpedoed and sunk in the [[Mediterranean Sea]] {{convert|14|nmi|km}} off [[Alexandria]], Egypt ({{coord|31|21|N|29|47|E}}) by {{SMU|UC-34||6}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=Bengali>{{cite web |url=http://uboat.net/wwi/ships_hit/742.html |title=Bengali |publisher=Uboat.net |access-date=5 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMS|E19}}
|flag={{Navy|UK}}
|desc=World War I: The [[British E-class submarine|E-class]] submarine was scuttled in the [[Gulf of Finland]] off the [[Harmaja]] Lighthouse.
}}
{{shipwreck list item
|ship={{SS|Flanders||2}}
|flag={{flag|Belgium}}
|desc=World War I: The cargo ship struck a [[naval mine|mine]] and sank in the [[North Sea]] off the coast of the Netherlands. Her crew were rescued.<ref name=Times110418a>{{Cite newspaper The Times |title=Imperial and Foreign news items. |date=11 April 1918 |page=5 |issue=41761 |column=E }}</ref>
}}
{{shipwreck list item
|ship={{SS|Nyassaland|1896|2}}
|flag={{Flag|Norway}}
|desc=World War I: The coaster was sunk in the [[English Channel]] {{convert|18|nmi|km}} east of [[Start Point, Devon]], [[United Kingdom of Great Britain and Ireland|United Kingdom]] by {{SMU|UB-33||6}} ({{navy|German Empire}}). Her crew survived.<ref name=Nyassaland>{{cite web |url=http://uboat.net/wwi/ships_hit/4501.html |title=Nyassaland |publisher=Uboat.net |access-date=3 November 2012}}</ref>
}}
{{shipwreck list item
|ship=''Superb''
|flag={{flag|Norway}}
|desc=World War I: The sailing vessel was sunk in the [[North Sea]] {{convert|40|nmi|km}} south of [[Lindesnes]], [[Vest-Agder]] by {{SMU|U-90||6}} ({{navy|German Empire}}). Her crew survived.<ref name=Superb>{{cite web |url=http://uboat.net/wwi/ships_hit/6897.html |title=Superb |publisher=Uboat.net |access-date=22 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Tainui||2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[cargo ship]] was torpedoed damaged in the [[Atlantic Ocean]] {{convert|60|nmi|km}} south west of the [[Isles of Scilly]] by {{SMU|U-82||6}} ({{navy|German Empire}}) and was abandoned by her crew. She was beached at [[Falmouth, Cornwall]] but was later salvaged, repaired and returned to service.<ref name=Empire397>{{cite book |last2=Sawyer |first2=LA |last1=Mitchell |first1=WH |year= 1990 |title=The Empire Ships |place=London, New York, Hamburg, Hong Kong |publisher=Lloyd's of London Press Ltd |isbn=1-85044-275-4 |edition=Second |page=397 }}</ref><ref name=Tainui>{{cite web |url=http://uboat.net/wwi/ships_hit/5889.html |title=Tainui |publisher=Uboat.net |access-date=21 October 2012}}</ref>
}}
{{shipwreck list end}}

==9 April==
{{shipwreck list begin |date=9 April 1918 |sort=}}
{{shipwreck list item
|ship={{HMT|Annie Smith}}
|flag={{navy|UK}}
|desc=The [[naval trawler]] was lost on this date.<ref name=Navy12>{{cite web |url=http://www.naval-history.net/WW1LossesBrRNA-L.htm |title=British Naval Vessels Lost at Sea Part 1 of 2 - Abadol (oiler) to Lynx (destroyer) |publisher=Naval History |access-date=2 February 2013}}</ref>
}}
{{shipwreck list item
|ship={{SS|Aveiro|1894|2}}
|flag={{flag|Portugal}}
|desc=[[World War I]]: The cargo ship was sunk in the [[Mediterranean Sea]] ({{coord|36|24|N|18|06|E}}) by {{SMU|UB-53||6}} ({{navy|German Empire}}). Her crew survived.<ref name=Aveiro>{{cite web |url=http://uboat.net/wwi/ships_hit/576.html |title=Aveiro |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMT|Lord Hardinge}}
|flag={{navy|UK}}
|desc=The naval trawler collided with another vessel and sank in the [[Irish Sea]] off the ''[[Daunt Lightship]]'' ({{flagcountry|UKGBI|government}}).<ref name=Cork>{{cite web |url=http://www.iol.ie/~mkeniry/Navalfleetsqueenstown.htm |title=The Royal Navy in Cork |publisher=Corkshipwrecks.net |access-date=12 February 2013}}</ref>
}}
{{shipwreck list item
|ship={{SS|President Leroy-Iallier|1881|2}}
|flag={{flag|France}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Atlantic Ocean]] {{convert|15|nmi|km}} north west of [[Ouessant]], [[Finistère]] ({{coord|48|50|N|5|13|W}}) by {{SMU|UB-109||6}} ({{navy|German Empire}}) with the loss of 26 of her crew.<ref name=PLI>{{cite web |url=http://uboat.net/wwi/ships_hit/4904.html |title=President Leroy-Iallier |publisher=Uboat.net |access-date=15 November 2012}}</ref>
}}
{{shipwreck list item
|ship=''RLS President Daniel E. Howard''
|flag={{navy|Liberia}}
|desc=World War I: The 73 ton Gunboat, an auxiliary sailing vessel and Liberia's only Navy ship, was sunk in the Atlantic Ocean off [[Monrovia]] by {{SMU|U-154||6}} ({{navy|German Empire}}). Either crew was captured and paroled, and/or 26 crew were killed. <ref name=PH>{{cite web |url=http://uboat.net/wwi/ships_hit/4903.html |title=President Howard |publisher=Uboat.net |access-date=26 October 2012}}</ref><ref>{{cite web |url=https://laststandonzombieisland.com/2023/04/10/the-day-the-kaiser-sank-the-entire-liberian-fleet/ |title=THE DAY THE KAISER SANK THE ENTIRE LIBERIAN FLEET |publisher=laststandonzombieisland.com |access-date=13 April 2024}}</ref>
}}
{{shipwreck list item
|ship={{SS|Vasconia|1899|2}}
|flag={{flag|Norway}}
|desc=World War I: The cargo ship struck a [[naval mine|mine]] and sank in the Mediterranean Sea north of [[Alexandria]], Egypt, with the loss of seven of her crew.<ref name=Vasconia>{{cite web |url=http://uboat.net/wwi/ships_hit/6266.html |title=Vasconia |publisher=Uboat.net |access-date=5 December 2012}}</ref>
}}
{{shipwreck list end}}

==10 April==
{{shipwreck list begin |date=10 April 1918 |sort=}}
{{shipwreck list item
|ship=''Asia''
|flag={{flagcountry|UKGBI|civil}}
|desc=The coaster foundered. Her crew were rescued by a Norwegian merchant vessel.<ref name=Times120418a>{{Cite newspaper The Times |title=(untitled) |date=12 April 1918 |page=3 |issue=41762 |column=A }}</ref>
}}
{{shipwreck list item
|ship=''Barge No. 21''
|flag={{flag|United States|1912}}
|desc=The barge was destroyed by fire in the [[New Orleans]], Louisiana, area.<ref>{{cite web |url=https://books.google.com/books?id=ErpIAAAAMAAJ&dq=Ship%3A+US+Army+Barge+No.+739%2C+1918&pg=PA3278 |title=Annual report of the chief of Engineers, U.S. Army, Corp of Engineers Year ending June 30, 1919 |year=1919 |publisher=Government Printing Office, Washington |via=Googlebooks |access-date=26 April 2021}}</ref>
}}
{{shipwreck list item
|ship={{ship|Italian destroyer|Benedetto Cairoli||2}}
|flag={{navy|Kingdom of Italy}}
|desc=The {{sclass|La Masa|destroyer|2}} collided with {{ship|Italian destroyer|Giacinto Carini||2}} ({{navy|Kingdom of Italy}}) and sank in the [[Ionian Sea]].<ref name=WWI18>{{cite web |url=http://www.worldwar1.co.uk/sunk18.htm |title=Major Warships Sunk in World War 1 1918 |publisher=World War I |access-date=24 February 2013}}</ref>
}}
{{shipwreck list item
|ship={{ship|French destroyer|Faulx||2}}
|flag={{navy|France}}
|desc=The {{sclass|Bouclier|destroyer|2}} was rammed and sunk in the [[Strait of Otranto]] by {{ship|French destroyer|Mangini||2}} ({{navy|France}}).<ref name=French>{{cite web|url=http://www.naval-history.net/WW1NavyFrench.htm |title=French Navy |publisher=Naval History |access-date=21 February 2013}}</ref>
}}
{{shipwreck list item
|ship={{SS|Henley|1894|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was torpedoed and sunk in the [[Atlantic Ocean]] {{convert|25|nmi|km}} south west of [[The Lizard]], [[Cornwall]] ({{coord|49|35|N|5|31|W}}) by {{SMU|UB-109}} ({{navy|German Empire}}) with the loss of six of her crew.<ref name=Henley>{{cite web |url=http://uboat.net/wwi/ships_hit/2804.html |title=Henley |publisher=Uboat.net |access-date=15 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{USS|SC-126}}
|flag={{navy|USA|1912}}
|desc=The [[submarine chaser]] grounded and partially sank near [[Two Rocks Passage]], [[Bermuda]] Harbor; finally sank about {{convert|100|yd}} south of [[Agar's Island]]. Raised, repaired, and returned to service in October.<ref name=":2">{{cite web |url=http://www.usmm.org/ww1navy.html |title=U. S. Navy Ships Sunk or Damaged from Various Causes during World War I |publisher=usmm.org |access-date=21 April 2021}}</ref><ref>{{cite web |url=https://wwi.marinersmuseum.org/subchasers-george-kennedy-briggs-walter-g-thomson/ |title=Sub Chasers |publisher=marinersmuseum.org |access-date=21 April 2021}}</ref>
}}
{{shipwreck list item
|ship={{SS|San Sabra||2}}
|flag={{flag|United States|1912}}
|desc=World War I: The passenger ship was sunk by a mine with all 30 hands {{convert|15|mi}} south east of [[Barnegat Lighthouse]], [[New Jersey]].<ref>{{cite web |url=https://www.wrecksite.eu/wreck.aspx17358 |title=San Saba (aka Magnolia) (+1918) |publisher=Wrecksite |access-date=26 August 2020}}</ref>
}}
{{shipwreck list item
|ship={{SS|Westfield|1901|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was sunk in the Atlantic Ocean {{convert|45|nmi|km}} south west by south of the [[Bishop Rock, Isles of Scilly]] ({{coord|49|10|N|6|46|W}}) by {{SMU|U-82}} ({{navy|German Empire}}). Her crew survived.<ref name=Westfield>{{cite web |url=http://uboat.net/wwi/ships_hit/6502.html |title=Westfield |publisher=Uboat.net |access-date=21 October 2012}}</ref>
}}
{{shipwreck list end}}

==11 April==
{{shipwreck list begin |date=11 April 1918 |sort=}}
{{shipwreck list item
|ship=''Carmela G''
|flag={{flagcountry|Kingdom of Italy|civil}}
|desc=[[World War I]]: The sailing vessel was sunk in the [[Mediterranean Sea]] west of [[Sicily]] by {{SMU|UB-50}} ({{navy|German Empire}}).<ref name=Carmelag>{{cite web |url=http://uboat.net/wwi/ships_hit/1133.html |title=Carmela G |publisher=Uboat.net |access-date=9 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Highland Prince|1901|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea {{convert|36|nmi|km}} north east of [[Cape Bon]], [[French Algeria|Algeria]] ({{coord|37|27|N|11|32|E}}) by {{SMU|UB-50}} ({{navy|German Empire}}) with the loss of three of her crew.<ref name=NH33/><ref name=HP>{{cite web |url=http://uboat.net/wwi/ships_hit/2848.html |title=Highland Prince |publisher=Uboat.net |access-date=9 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMS|King Alfred|1901|6}}
|flag={{navy|UK}}
|desc=World War I: The {{sclass|Drake|cruiser|2}} was torpedoed and damaged in the [[Atlantic Ocean]] {{convert|30|nmi|km}} north of [[Malin Head]], [[County Donegal]] by {{SMU|UB-86}} ({{navy|German Empire}}) with the loss of a crew member.<ref name=KA>{{cite web |url=http://uboat.net/wwi/ships_hit/7431.html |title=HMS King Alfred |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Kingstonian|1901|2}}
|flag={{Flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and damaged in the Mediterranean Sea off [[San Pietro Island]], Italy ({{coord|39|20|N|7|10|E}}) by {{SMU|UB-68}} ({{navy|German Empire}}) with the loss of a crew member. She was beached in Carloforte Bay but was again torpedoed and damaged on 29 April by {{SMU|UB-48||6}} ({{navy|German Empire}}) and was a total loss.<ref name=Kingstonian>{{cite web |url=http://uboat.net/wwi/ships_hit/3337.html |title=Kingstonian |publisher=Uboat.net |access-date=8 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{USS|Lakemoor|ID-2180|6}}
|flag={{navy|USA|1912}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Irish Sea]] {{convert|2.5|nmi|km}} off the [[Corsewall Lighthouse]], [[Wigtownshire]], [[United Kingdom of Great Britain and Ireland|United Kingdom]] by {{SMU|UB-64}} ({{navy|German Empire}}) with the loss of 46 of her crew.<ref name=Lakemoor>{{cite web |url=http://uboat.net/wwi/ships_hit/3481.html |title=Lakemoor |publisher=Uboat.net |access-date=11 November 2012}}</ref><ref>{{cite web |url=https://www.abmc.gov/db-abmc-burial-unit/uss-lakemoor |title=USS Lakemoor |publisher=American Battle Monuments Commission |access-date=22 July 2021}}</ref>
}}
{{shipwreck list item
|ship={{USS|Mary B. Garner|SP-682|6}}
|flag={{navy|USA|1912}}
|desc=The [[patrol vessel]] ran aground at Prime Hook, [[Delaware]] and was wrecked. She was later salvaged, repaired and returned to service. One killed.<ref name=":2"/>
}}
{{shipwreck list item
|ship={{SS|Myrtle Branch|1899|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Atlantic Ocean]] {{convert|9|nmi|km}} north east by north of [[Inishtrahull Island]], [[County Donegal]] by {{SMU|UB-73}} ({{navy|German Empire}}) with the loss of fifteen of her crew.<ref name=MB>{{cite web |url=http://uboat.net/wwi/ships_hit/4287.html |title=Myrtle Branch |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SMS|Rheinland}}
|flag={{navy|German Empire}}
|desc=The {{sclass|Nassau|battleship|2}} ran aground on Laagskar Island, [[Åland]], Sweden with the loss of two of her crew. She was refloated on 20 April and subsequently served as a [[barracks ship]].
}}
{{shipwreck list item
|ship={{SMU|UB-33}}
|flag={{navy|German Empire}}
|desc=World War I: The [[German Type UB II submarine|Type UB II]] submarine struck a mine and sank in the [[Strait of Dover]] ({{coord|50|55|N|1|17|E}}) with the loss of all 28 crew.
}}
{{shipwreck list end}}

==12 April==
{{shipwreck list begin |date=12 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Autolycus|1917|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was torpedoed and sunk in the [[Mediterranean Sea]] {{convert|38|nmi|km}} off [[Cape Palos]], Spain ({{coord|38|01|N|0|23|E}}) by {{SMU|U-34|Germany|6}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=Autolycus>{{cite web |url=http://uboat.net/wwi/ships_hit/569.html |title=Autlycus |publisher=Uboat.net |access-date=2 October 2012}}</ref>
}}
{{shipwreck list item
|ship=HM ''CMB-18A''
|flag={{navy|UK}}
|desc=The [[Coastal Motor Boat]] was lost on this date.<ref name=Navy12/>
}}
{{shipwreck list item
|ship=HM ''CMB-33A''
|flag={{navy|UK}}
|desc=The Coastal Motor Boat was lost on this date.<ref name=Navy12/>
}}
{{shipwreck list item
|ship={{SS|Lonhelen|1911|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship struck a [[naval mine|mine]] and sank in the [[North Sea]] south west of the ''[[Shipwash Lightship]]'' ({{flagcountry|UKGBI|government}}). Her crew survived.<ref name=Lonhelen>{{cite web |url=http://uboat.net/wwi/ships_hit/3687.html |title=Lonhelen |publisher=Uboat.net |access-date=18 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Luis|1916|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[English Channel]] {{convert|3.5|nmi|km}} south south east of [[St. Catherine's Point]], [[Isle of Wight]] by {{SMU|UC-71||6}} ({{navy|German Empire}}) with the loss of four of her crew.<ref name=Luis>{{cite web |url=http://uboat.net/wwi/ships_hit/3756.html |title=Luis |publisher=Uboat.net |access-date=27 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Luisa|1897|2}}
|flag={{flag|Spain|civil-1785}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Atlantic Ocean]] {{convert|6|nmi|km}} west by south of the [[Pendeen Lighthouse]], [[Cornwall]], [[United Kingdom of Great Britain and Ireland|United Kingdom]] ({{coord|50|07|N|5|49|W}}) by {{SMU|UB-74||6}} ({{navy|German Empire}}). Her crew survived.<ref name=Luisa>{{cite web |url=http://uboat.net/wwi/ships_hit/7197.html |title=Luisa |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Moyune|1895|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: [[Convoy HE 9]]: The cargo ship was torpedoed and sunk in the Mediterranean sea off Cape Palos ({{coord|37|26|N|0|06|E}}) by {{SMU|U-34|Germany|6}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=Moyune>{{cite web |url=http://uboat.net/wwi/ships_hit/4270.html |title=Moyune |publisher=Uboat.net |access-date=2 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{ship||Njaal|barque|2}}
|flag=[[File:Flag of the Russian SFSR.svg|25px]] [[Russian Soviet Federative Socialist Republic|Russia]]
|desc=World War I: The [[barque]] was sunk in the North Sea off [[Flekkefjord]] by {{SMU|U-104||6}} ({{navy|German Empire}}).<ref name=Njaal>{{cite web |url=http://uboat.net/wwi/ships_hit/4414.html |title=Njaal |publisher=Uboat.net |access-date=25 October 2012}}</ref>
}}
{{shipwreck list end}}

==13 April==
{{shipwreck list begin |date=13 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|City of Wilmington|1912|2}}
|flag={{flag|United States|1912}}
|desc=The steamer burned and sank in the [[Atlantic Ocean]] {{convert|250|mi}} east of [[Halifax, Nova Scotia]].<ref>{{cite web |url=https://www.wrecksite.eu/wreck.aspx?135769 |title=City of Wilmington (+1918) |publisher=Wrecksite |access-date=22 September 2020}}</ref><ref name=":1">{{cite web |url=http://www.usmm.org/ww1merchant.html |title=U.S. Merchant Ships, Sailing Vessels, and Fishing Craft Lost from all Causes during World War I |publisher=usmm.org |access-date=22 September 2020}}</ref>
}}
{{shipwreck list item
|ship={{SS|Harewood|1913|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was shelled and sunk in the [[Atlantic Ocean]] {{convert|380|nmi|km}} west by south of [[Lisbon]], Portugal by {{SMU|U-155||6}} ({{navy|German Empire}}) with the loss of two of her crew.<ref name=NH33/><ref name=Harewood>{{cite web |url=http://uboat.net/wwi/ships_hit/2712.html |title=Harewood |publisher=Uboat.net |access-date=27 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Provence|1884|2}}
|flag={{flag|France}}
|desc=World War I: The cargo ship was torpedoed and damaged in the [[Mediterranean Sea]] {{convert|1.5|nmi|km}} off the [[Cape Palamos Lighthouse]], Spain ({{coord|41|43|N|3|09|E}}) by {{SMU|UB-68||6}} ({{navy|German Empire}}). She was beached but was later refloated, repaired and returned to service.<ref name=Provence>{{cite web |url=http://uboat.net/wwi/ships_hit/4950.html |title=Provence |publisher=Uboat.net |access-date=11 November 2012}}</ref>
}}
{{shipwreck list item
|ship=''Ruth''
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The fishing smack was scuttled in the [[North Sea]] by a [[Kaiserliche Marine]] submarine.<ref name=Fish22>{{cite web |url=http://www.naval-history.net/WW1LossesBrFV1917-18.htm |title=British Fishing Vessels Lost to Enemy Action Part 2 of 2 - Years 1917, 1918 in date order |publisher=Naval History |access-date=2 February 2013}}</ref>
}}
{{shipwreck list item
|ship={{ship||Wilson|schooner|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[schooner]] was scuttled in the Atlantic Ocean {{convert|10|nmi|km}} north west of the [[Smalls Lighthouse]] by {{SMU|UB-109||6}} ({{navy|German Empire}}). Her crew survived.<ref name=Wilson>{{cite web |url=http://uboat.net/wwi/ships_hit/6554.html |title=Wilson |publisher=Uboat.net |access-date=15 November 2012}}</ref>
}}
{{shipwreck list end}}

==14 April==
{{shipwreck list begin |date=14 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Admiral Codrington|1918|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=and {{SS|Southgare||2}} ({{flagcountry|Sweden}}): The two cargo ships collided in the North Sea off the coast of the [[East Riding of Yorkshire]]. ''Southgare'' sank about {{convert|6|nmi|km}} off Crab Rocks, [[Bempton Cliffs]], with the loss of 11 men; 10 were rescued.<ref>{{cite web |url= http://www.wrecksite.eu/wreck.aspx?65647 |title=SS Southgare [+1918] |last1=Lettens |first1=Jan |last2=Racey |first2=Carl |date=9 March 2011 |work=WreckSite |publisher=wrecksite.eu |access-date=23 September 2014}}</ref> The newly built ''Admiral Codrington'' sank just south of [[Flamborough Head]].<ref>{{cite web |url= http://www.wrecksite.eu/wreck.aspx?126119 |title=SS Admiral Codrington [+1918] |last1=Lettens |first1=Jan |last2=Racey |first2=Carl |date=9 March 2011 |work=WreckSite |publisher=wrecksite.eu |access-date=23 September 2014}}</ref>
}}
{{shipwreck list item
|ship={{SS|Chelford|1906|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was torpedoed and sunk in the [[Irish Sea]] north west of [[Bardsey Island]], [[Pembrokeshire]] ({{coord|52|48|N|5|04|W}}) by {{SMU|UB-73||6}} ({{navy|German Empire}}). Her crew survived.<ref name=Chelford>{{cite web |url=http://uboat.net/wwi/ships_hit/1238.html |title=Chelford |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Maroc|1898|2}}
|flag={{Flag|France}}
|desc=World War I: The cargo ship was sunk in the [[Atlantic Ocean]] {{convert|2|nmi|km}} off the [[Longships Lighthouse]], [[Cornwall]], [[United Kingdom of Great Britain and Ireland|United Kingdom]] by {{SMU|UB-74||6}} ({{navy|German Empire}}).<ref name=Maroc>{{cite web |url=http://uboat.net/wwi/ships_hit/3985.html |title=Maroc |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Marstonmoor|1906|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[collier (ship type)|collier]] was torpedoed and sunk in the Atlantic Ocean {{convert|55|nmi|km}} north north east of [[Cape Wrath]], [[Sutherland]] ({{coord|59|34|N|4|45|W}}) by {{SMU|U-107||6}} ({{navy|German Empire}}). Her crew survived.<ref name=Navy22>{{cite web |url=http://www.naval-history.net/WW1LossesBrRNM-Z.htm |title=British Naval Vessels Lost at Sea Part 2 of 2 - M.15 (monitor) to Zylpha (Q-ship) |publisher=Naval History |access-date=12 February 2013}}</ref><ref name=Marstonmoor>{{cite web |url=http://uboat.net/wwi/ships_hit/3996.html |title=Marstonmoor |publisher=Uboat.net |access-date=25 October 2012}}</ref>
}}
{{shipwreck list item
|ship=SS ''Santa Isabel''
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was shelled and sunk in the Atlantic Ocean {{convert|15|nmi|km}} off the [[Cape Verde Islands]], Portugal by {{SMU|U-153||6}} ({{navy|German Empire}}) with the loss of a crew member.<ref name=NH33/><ref name=SI>{{cite web |url=http://uboat.net/wwi/ships_hit/5431.html |title=Santa Isabel |publisher=Uboat.net |access-date=26 October 2012}}</ref>
}}
{{shipwreck list end}}

==15 April==
{{shipwreck list begin |date=15 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Ailsa Craig|1906|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was sunk in the [[English Channel]] {{convert|14|nmi|km}} west by north of [[Portland Bill]], [[Dorset]] ({{coord|50|30|N|2|48|W}}) by {{SMU|UB-80||6}} ({{navy|German Empire}}). Her crew survived.<ref name=AC>{{cite web |url=http://uboat.net/wwi/ships_hit/128.html |title=Ailsa Craig |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Pomeranian|1882|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The ship was sunk in the English Channel {{convert|9|nmi|km}} off Portland Bill by {{SMU|UC-77||6}} ({{navy|German Empire}}) with the loss of 55 lives.<ref name=Pomeranian>{{cite web |url=http://uboat.net/wwi/ships_hit/4857.html |title=Pomeranian |publisher=Uboat.net |access-date=30 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Rostov|1867|2}}
|flag={{navy|Russian Empire}}
|desc=World War I: The transport ship was sunk in the [[Black Sea]] south of [[Sevastopol]] ({{coord|44|34|N|34|20|E}}) by {{SMU|UC-23||6}} ({{navy|German Empire}}).<ref name=Rostov>{{cite web |url=http://uboat.net/wwi/ships_hit/5222.html |title=Rostov |publisher=Uboat.net |access-date=30 November 2012}}</ref>
}}
{{shipwreck list end}}

==16 April==
{{shipwreck list begin |date=16 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Florence H.||2}}
|flag={{flag|United States|1912}}
|desc=The cargo ship suffered an onboard explosion and sank at anchor in [[Quiberon Bay]], or in the port of [[Quiberon]] with the loss of 17 gunners and 24 of her 75 crew, 32 survivors, including 6 gunners, were rescued by a destroyer.<ref name=Times220418a>{{Cite newspaper The Times |title=Imperial and Foreign news items |date=22 April 1918 |page=7 |issue=41770 |column=E }}</ref><ref>{{cite web |url=https://babel.hathitrust.org/cgi/pt?id=osu.32435066692476&view=1up&seq=68 |title=Annual Report of the supervising Inspector of the United States Steam boat Inspection Service, June 30, 1918 |publisher=Government Printing Office, Washington |via=Haithi Trust |access-date=22 February 2021}}</ref><ref>{{cite web |url=https://www.wrecksite.eu/wreck.aspx?139707 |title=Florence H. (+1918) |publisher=Wrecksite |access-date=22 February 2021}}</ref>
}}
{{shipwreck list item
|ship={{ship|Italian submarine|H5||2}}
|flag={{navy|Kingdom of Italy|name=Italian Royal Navy}}
|desc=[[World War I]]: The [[Holland 602 type submarine|H-class]] [[submarine]] was sunk in error in the southern [[Adriatic Sea]] by a [[torpedo]] fired by the submarine {{HMS|H1}} ({{navy|United Kingdom}}).<ref>Gray, Randal, ed., ''Conway′s All the World′s Fighting Ships 1906-1921'', Annapolis, Maryland: Naval Institute Press, 1985, {{ISBN|0-87021-907-3}}, p. 278.</ref>
}}
{{shipwreck list item
|ship={{SS|Hungerford|1913|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[English Channel]] {{convert|9|nmi|km}} south south east of the ''[[Owers Lightship]]'' ({{coord|50|33|N|0|35|W}}) by {{SMU|UC-75}} ({{navy|German Empire}}) with the loss of eight of her crew.<ref name=Hungerford>{{cite web |url=http://uboat.net/wwi/ships_hit/2917.html |title=Hungerford |publisher=Uboat.net |access-date=29 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Ladoga|1914|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Irish Sea]] {{convert|15|nmi|km}} south east of the ''[[South Arklow Lightship]]'' ({{flagcountry|UKGBI|government}}) ({{coord|52|33|N|5|35|W}}) by {{SMU|UB-73}} ({{navy|German Empire}}) with the loss of 29 of her crew.<ref name=Ladoga>{{cite web |url=http://uboat.net/wwi/ships_hit/3461.html |title=Ladoga |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Lake Michigan|1902|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[passenger ship]] was torpedoed and sunk in the [[Atlantic Ocean]] {{convert|93|nmi|km}} north by west of [[Eagle Island, County Mayo]] ({{coord|55|30|N|11|52|W}}) by {{SMU|U-100}} ({{navy|German Empire}} with the loss of a crew member.<ref name=NH33/><ref name=LM>{{cite web |url=http://uboat.net/wwi/ships_hit/3480.html |title=Lake Michigan |publisher=Uboat.net |access-date=24 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Lodaner|1905|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was sunk in the Irish Sea south east of the ''[[South Arklow Lightship]]'' ({{flagcountry|UKGBI|government}}) by {{SMU|UB-73}} ({{navy|German Empire}}) with the loss of all 32 crew.<ref name=Lodaner>{{cite web |url=http://uboat.net/wwi/ships_hit/3669.html |title=Lodaner |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Nirpura|1916|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean {{convert|110|nmi|km}} west north west of [[Cabo da Roca]], Portugal ({{coord|38|57|N|11|55|W}}) by {{SMU|U-155}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=Nirpura>{{cite web |url=http://uboat.net/wwi/ships_hit/4409.html |title=Nirpura |publisher=Uboat.net |access-date=27 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{MV|Polarine||2}}
|flag={{flag|United States|1912}}
|desc=The motor boat sank off [[Watch Hill, Rhode Island]].<ref name=":0"/>
}}
{{shipwreck list item
|ship={{SS|Romania|1898|2}}
|flag={{flagcountry|Kingdom of Italy|civil}}
|desc=World War I: The cargo ship was sunk in the [[Adriatic Sea]] off [[Cape Linguetta]], Albania ({{coord|40|24|N|19|14|E}}) by {{SMU|UC-22}} ({{navy|German Empire}}). Her crew survived.<ref name=Romania>{{cite web |url=http://uboat.net/wwi/ships_hit/5180.html |title=Romania |publisher=Uboat.net |access-date=29 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMT|Select}}
|flag={{navy|UK}}
|desc=The [[naval trawler]] was lost on this date.<ref name=Navy22/>
}}
{{shipwreck list item
|ship={{SMS|Streiter}}
|flag={{navy|Austria-Hungary}}
|desc=World War I: The {{sclass|Huszár|destroyer|2}} collided with {{SS|Petka||2}} ({{flag|Austria-Hungary|civil}}) and sank in the [[Adriatic Sea]] off [[Lovran]] ({{coord|45|00|N|14|15|E}}). She was escorting a convoy at the time.<ref name=AHN>{{cite web|url=http://www.naval-history.net/WW1NavyAustrian.htm |title=AUSTRO-HUNGARIAN NAVY, Kaiserlich und Koniglich or k.u.k Kriegsmarine |publisher=Naval History |access-date=21 February 2013}}</ref>
}}
{{shipwreck list item
|ship=''Widwud''
|flag=[[File:Flag of the Russian SFSR.svg|25px]] [[Russian Soviet Federative Socialist Republic|Russia]]
|desc=World War I: The sailing vessel was sunk in the Atlantic Ocean north west of [[Ireland]] by {{SMU|U-104}} ({{navy|German Empire}}).<ref name=Widwud>{{cite web |url=http://uboat.net/wwi/ships_hit/6529.html |title=Widwud |publisher=Uboat.net |access-date=25 October 2012}}</ref>
}}
{{shipwreck list end}}

==17 April==
{{shipwreck list begin |date=17 April 1918 |sort=}}
{{shipwreck list item
|ship={{SMS|LM2}}
|flag={{navy|German Empire}}
|desc=[[World War I]]: The {{sclass|L1|motor patrol boat|0}} motor patrol boat was destroyed by a fire or explosion.
}}
{{shipwreck list item
|ship={{SMU|UB-82||6}}
|flag={{navy|German Empire}}
|desc=World War I: The [[German Type UB III submarine|Type UB III]] submarine was depth charged and sunk in the [[Irish Sea]] ({{coord|55|13|N|5|55|W}}) by two [[Royal Navy]] [[naval trawler|trawlers]] with the loss of all 32 crew.<ref name=UB82>{{cite web |url=http://uboat.net/wwi/boats/index.html?boat=UB+82 |title=UB 82 |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list end}}

==18 April==
{{shipwreck list begin |date=18 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Bamse|1875|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The coaster was torpedoed and sunk in the [[English Channel]] {{convert|15|nmi|km}} west by north of [[Portland Bill]], [[Dorset]] by {{SMU|UB-80||6}} ({{navy|German Empire}}) with the loss of four of her crew.<ref name=NH33/><ref name=Bamse>{{cite web |url=http://uboat.net/wwi/ships_hit/6796.html |title=Bamse |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{ship|German trawler|Claus Groth||2}}
|flag={{navy|German Empire}}
|desc=World War I: The ''Greta''-class ''[[Vorpostenboot]]'' was sunk by mines off [[Cape Tachkuna]], [[Estonia]].<ref>{{cite web |url=http://www.soviet-empire.com/ussr/viewtopic.php?f=149&t=53513 |title=Soviet Naval Battles during Civil War (Redone) |publisher=Soviet-Empire |access-date=14 September 2018}}</ref>
}}
{{shipwreck list item
|ship={{SS|Dalegarth Force|1914|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the English Channel {{convert|12|nmi|km}} south west of [[Hartland Point]], [[Devon]] ({{coord|50|51|N|4|42|W}}) by {{SMU|UB-73||6}} ({{navy|German Empire}}) with the loss of five crew.<ref name=DF>{{cite web |url=http://uboat.net/wwi/ships_hit/1548.html |title=Dalegarth Force |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Gregynog|1899|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[collier (ship type)|collier]] was torpedoed and sunk in the English Channel {{convert|16|nmi|km}} south west of Hartland Point ({{coord|50|47|N|4|44|W}}) by {{SMU|UB-86||6}} ({{navy|German Empire}}) with the loss of three of her crew.<ref name=NH33/><ref name=Navy12/><ref name=Gregynog>{{cite web |url=http://uboat.net/wwi/ships_hit/2609.html |title=Gregynog |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Pentyrch|1899|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the English Channel {{convert|5|nmi|km}} west north west of the ''[[Brighton Lightship]]'' ({{flagcountry|UKGBI|government}}) by {{SMU|UB-40||6}} ({{navy|German Empire}}) with the loss of a crew member.<ref name=NH33/><ref name=Pentyrch>{{cite web |url=http://uboat.net/wwi/ships_hit/4730.html |title=Pentyrch |publisher=Uboat.net |access-date=6 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Runswick|1904|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and damaged in the Atlantic Ocean {{convert|3|nmi|km}} north of [[Trevose Head]], [[Cornwall]] ({{coord|50|33|N|5|03|W}}) by {{SMU|UB-109||6}} ({{navy|German Empire}}). She was beached but was declared a total loss. Her crew survived.<ref name=Runswick>{{cite web |url=http://uboat.net/wwi/ships_hit/5249.html |title=Runswick |publisher=Uboat.net |access-date=15 November 2012}}</ref>
}}
{{shipwreck list end}}

==19 April==
{{shipwreck list begin |date=19 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Alice Taylor||2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=The coaster foundered on this date. Her crew were rescued.<ref name=Times200418a>{{Cite newspaper The Times |title=News in Brief. |date= April 1918 |page=3 |issue=41769 |column=F }}</ref>
}}
{{shipwreck list item
|ship={{SS|Elka|1881|2}}
|flag={{flagicon|Greece}} [[Kingdom of Greece|Greece]]
|desc=[[World War I]]: [[Convoy GaG16]]: The cargo ship was torpedoed and sunk in the [[Mediterranean Sea]] {{convert|50|nmi|km}} off [[Cape Gati]], Spain, by {{SMU|U-34|Germany|6}} ({{navy|German Empire}}). Her crew survived.<ref name=Elka>{{cite web |url=http://uboat.net/wwi/ships_hit/1891.html |title=Elka |publisher=Uboat.net |access-date=2 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Lord Charlemont|1886|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea {{convert|22|nmi|km}} north of the [[Isla de Alborán]], [[Spanish Morocco|Morocco]] ({{coord|36|15|N|3|04|W}}) by {{SMU|U-34|Germany|6}} ({{navy|German Empire}}) with the loss of eight crew.<ref name=LC>{{cite web |url=http://uboat.net/wwi/ships_hit/3691.html |title=Lord Charlemont |publisher=Uboat.net |access-date=2 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{ship|French trawler|Salambo||2}}
|flag={{navy|France}}
|desc=World War I: The [[naval trawler]] was torpedoed and sunk in the [[Ionian Sea]] ({{coord|38|30|N|18|06|E}}) by {{SMU|U-38}} ({{navy|German Empire}}). Her crew survived.<ref name=Salambo>{{cite web |url=http://uboat.net/wwi/ships_hit/5350.html |title=Salambo |publisher=Uboat.net |access-date=5 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SMU|UB-78}}
|flag={{navy|German Empire}}
|desc=World War I: The [[German Type UB III submarine|Type UB III]] submarine struck a [[naval mine|mine]] and sank in the [[Strait of Dover]] ({{coord|51|01|N|1|17|E}}) with the loss of all 35 crew.<ref name=UB78>{{cite web |url=http://uboat.net/wwi/boats/index.html?boat=UB+78 |title=UB 78 |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|War Helmet||2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the English Channel {{convert|3|nmi|km}} east by north of the ''[[Owers Lightship]]'' ({{flagcountry|UKGBI|government}}) by {{SMU|UC-75}} ({{navy|German Empire}}). Her crew survived.<ref name=WH>{{cite web |url=http://uboat.net/wwi/ships_hit/6446.html |title=War Helmet |publisher=Uboat.net |access-date=29 December 2012}}</ref>
}}
{{shipwreck list end}}

==20 April==
{{shipwreck list begin |date=20 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Florrieston|1901|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was torpedoed and sunk in the [[Irish Sea]] {{convert|6|nmi|km}} east of [[South Stack]], [[Anglesey]] by {{SMU|U-91||6}} ({{navy|German Empire}}) with the loss of nineteen of her crew.<ref name=Florrieston>{{cite web |url=http://uboat.net/wwi/ships_hit/2218.html |title=Florrieston |publisher=Uboat.net |access-date=23 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Lowther Range|1906|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the Irish Sea {{convert|20|nmi|km}} west by north of South Stack ({{coord|53|18|N|5|10|W}}) by {{SMU|U-104||6}} ({{navy|German Empire}}). Her crew survived.<ref name=LR>{{cite web |url=http://uboat.net/wwi/ships_hit/3724.html |title=Lowther Range |publisher=Uboat.net |access-date=23 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SMS|M39||6}}
|flag={{navy|German Empire}}
|desc=World War I: The [[M-class minesweeper (Germany)|Type 1915 minesweeper]] struck a mine and sank in the [[North Sea]].
}}
{{shipwreck list item
|ship={{SMS|M64||6}}
|flag={{navy|German Empire}}
|desc=World War I: The [[M-class minesweeper (Germany)|Type 1916 minesweeper]] struck a mine and sank in the [[North Sea]].
}}
{{shipwreck list item
|ship={{SMS|M95||6}}
|flag={{navy|German Empire}}
|desc=World War I: The [[M-class minesweeper (Germany)|Type 1916 minesweeper]] struck a mine and sank in the [[North Sea]].
}}
{{shipwreck list item
|ship={{HMT|Numitor}}
|flag={{navy|UK}}
|desc=World War I: The [[naval trawler]] struck a [[naval mine|mine]] and sank in the [[North Sea]] off [[Orfordness]], [[Suffolk]] ({{coord|52|07|N|1|45|E}}) with the loss of five of her crew.<ref name=Numitor>{{cite web |url=http://uboat.net/wwi/ships_hit/4490.html |title=Numitor |publisher=Uboat.net |access-date=18 November 2012}}</ref>
}}
{{shipwreck list end}}

==21 April==
{{shipwreck list begin |date=21 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Bellview|1894|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The [[collier (ship type)|collier]] was torpedoed and sunk in the [[Mediterranean Sea]] {{convert|16|nmi|km}} east north east of [[Cape Bon]], [[French protectorate of Tunisia|Tunisia]] ({{coord|37|13|N|11|21|E}}) by {{SMU|U-32|Germany|6}} ({{navy|German Empire}}). Her crew survived.<ref name=Navy12/><ref name=Bellview>{{cite web |url=http://uboat.net/wwi/ships_hit/727.html |title=Bellview |publisher=Uboat.net |access-date=30 September 2012}}</ref>
}}
{{shipwreck list item
|ship=''Delta A''
|flag={{flag|Belgium}}
|desc=World War I: The trawler was stopped and sunk in the [[Atlantic Ocean]] {{convert|18|nmi|km}} south of [[St Kilda, Scotland|St. Kilda]], [[Inverness-shire]], [[United Kingdom of Great Britain and Ireland|United Kingdom]] by {{SMU|U-19|Germany|6}} ({{navy|German Empire}}).<ref name=DA>{{cite web |url=http://uboat.net/wwi/ships_hit/1599.html |title=Delta A |publisher=Uboat.net |access-date=27 September 2012}}</ref>
}}
{{shipwreck list item
|ship={{SMS|Emma Oetken}}
|flag={{navy|German Empire}}
|desc=The ''[[Vorpostenboot]]'' was lost on this date.
}}
{{shipwreck list item
|ship={{SS|Landonia|1917|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Irish Sea]] {{convert|27|nmi|km}} north west by west of [[Strumble Head]], [[Pembrokeshire]] by {{SMU|U-91||6}} ({{navy|German Empire}}) with the loss of 21 of her crew. One of the survivors was taken as a [[prisoner of war]].<ref name=NH33/><ref name=Landonia>{{cite web |url=http://uboat.net/wwi/ships_hit/3491.html |title=Landonia |publisher=Uboat.net |access-date=23 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Normandiet|1902|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the Irish Sea {{convert|34|nmi|km}} south west by west of the [[Calf of Man]], [[Isle of Man]] by {{SMU|U-91||6}} ({{navy|German Empire}}) with the loss of nineteen of her crew.<ref name=NH33/><ref name=Normandiet>{{cite web |url=http://uboat.net/wwi/ships_hit/4446.html |title=Normandiet |publisher=Uboat.net |access-date=23 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SMU|UB-71||6}}
|flag={{navy|German Empire}}
|desc=World War I: The [[German Type UB III submarine|Type UB III]] submarine was [[depth charge]]d and sunk in the [[Strait of Gibraltar]] ({{coord|35|38|N|5|18|W}}) by ''HMML 413'' ({{navy|UK}}) with the loss of all 32 crew.<ref name=UB71>{{cite web |url=http://uboat.net/wwi/boats/index.html?boat=UB+71 |title=UB 71 |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Westergate|1881|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[English Channel]] {{convert|22|nmi|km}} east of [[Start Point, Devon]] by {{SMU|UB-80||6}} ({{navy|German Empire}}) with the loss of 24 of her crew.<ref name=NH33/><ref name=Westergate>{{cite web |url=http://uboat.net/wwi/ships_hit/6500.html |title=Westergate |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list end}}

==22 April==
{{shipwreck list begin |date=22 April 1918 |sort=}}
{{shipwreck list item
|ship={{Ship|ST|Baron Herries|1907|2}}
|flag={{navy|UK}}
|desc=[[World War I]]: The [[tugboat|naval tug]] was torpedoed and sunk in the [[Atlantic Ocean]] {{convert|43|nmi|km}} north by west of the [[Bishop Rock, Isles of Scilly]] ({{coord|50|27|N|7|06|W}}) by {{SMU|U-91||6}} ({{navy|German Empire}}) with the loss of three of her crew. One of the survivors was taken as a [[prisoner of war]].<ref name=NH33/><ref name=Navy12/><ref name=BH>{{cite web |url=http://uboat.net/wwi/ships_hit/646.html |title=Baron Herries |publisher=Uboat.net |access-date=23 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Dronning Maud|1917|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[collier (ship type)|collier]] was torpedoed and sunk in the [[Mediterranean Sea]] {{convert|65|nmi|km}} north north east of [[Cape Sigli]], [[French Algeria|Algeria]] ({{coord|38|00|N|4|56|E}}) by {{SMU|U-34|Germany|6}} ({{navy|German Empire}}) with the loss of a crew member.<ref name=NH33/><ref name=Navy12/><ref name=DM>{{cite web |url=http://uboat.net/wwi/ships_hit/1722.html |title=Dronning Maud |publisher=Uboat.net |access-date=2 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Eric Calvert|1889|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The collier was torpedoed and sunk in the Atlantic Ocean {{convert|4|nmi|km}} south south west of [[St Anthony Head]], [[Cornwall]] {{coord|50|04|30|N|5|01|45|W}}) by {{SMU|UB-103||6}} ({{navy|German Empire}}) with the loss of two of her crew.<ref name=Navy12/><ref name=EC>{{cite web |url=http://uboat.net/wwi/ships_hit/1987.html |title=Eric Calvert |publisher=Uboat.net |access-date=13 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{USS|Fenimore|ID-2681|6}}
|flag={{Navy|USA|1912}}
|desc=The cargo ship was destroyed by fire in [[New York Harbor]].<ref name=Fenimore>{{cite DANFS |title=Fenimore |url=http://www.hazegray.org/danfs/auxil/fenimore.htm |access-date=4 May 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Fern|1900|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Irish Sea]] {{convert|5|nmi|km}} east of the ''[[Kish Lightship]]'' ({{flagcountry|UKGBI|government}}) by {{SMU|U-104||6}} ({{navy|German Empire}}) with the loss of thirteen crew.<ref name=NH33/><ref name=Fern>{{cite web |url=http://uboat.net/wwi/ships_hit/2158.html |title=Fern |publisher=Uboat.net |access-date=25 October 2012}}</ref>
}}
{{shipwreck list item
|ship=''Kheda Moulekar''
|flag={{flag|France}}
|desc=World War I: The sailing vessel was sunk in the Mediterranean Sea ({{coord|32|08|N|32|50|E}}) by {{SMU|UB-53||6}} ({{navy|German Empire}}).<ref name=KM>{{cite web |url=http://uboat.net/wwi/ships_hit/3308.html |title=Khedi Moulekar |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship=''Marshalla''
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The sailing vessel was sunk by shellfire in the Mediterranean Sea {{convert|50|nmi|km}} north of [[Port Said]], Egypt ({{Coord|32|11|N|32|39|E}}) by {{SMU|UB-53||6}} ({{navy|German Empire}}).<ref name=NH33/><ref name=Marshalla>{{cite web |url=http://uboat.net/wwi/ships_hit/3994.html |title=Marshalla |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Prinz August Wilhelm||2}}
|flag={{flagcountry|German Empire|civil}}
|desc=The [[Hamburg America Line]] steamship was burned and scuttled in [[Puerto Colombia]] to prevent the [[United States Shipping Board]] from seizing her.<ref>{{Cite news |title=Burns German ship to block U. S. move |newspaper=[[The Sun (New York City)|The Sun]] |place=New York |date=10 May 1918 |page=4 |access-date=18 February 2024 |via=[[Library of Congress]] |url= https://chroniclingamerica.loc.gov/lccn/sn83030431/1918-05-10/ed-1/seq-4/}}</ref><ref>{{Cite news |title=Hamburg Liner Set on Fire |newspaper=[[New-York Tribune]] |date=10 May 1918 |page=14 |access-date=18 February 2024 |via=Library of Congress |url= https://chroniclingamerica.loc.gov/search/pages/results/?state=New+York&date1=1914&date2=1918&proxtext=Prinz+August+Wilhelm&x=11&y=11&dateFilterType=yearRange&rows=50&searchType=basic}}</ref>
}}
{{shipwreck list item
|ship={{HMT|Pursuit}}
|flag={{navy|UK}}
|desc=The [[naval trawler]] was lost on this date.<ref name=Navy22/>
}}
{{shipwreck list item
|ship=''Sadika''
|flag={{flag|France}}
|desc=World War I: The sailing vessel was sunk in the Mediterranean Sea ({{coord|32|13|N|32|40|E}}) by {{SMU|UB-53||6}} ({{navy|German Empire}}).<ref name=Sadika>{{cite web |url=http://uboat.net/wwi/ships_hit/5291.html |title=Sadika |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SMU|UB-55||6}}
|flag={{navy|German Empire}}
|desc=World War I: The [[German Type UB III submarine|Type UB III]] [[submarine]] struck a mine and sank in the [[Strait of Dover]] ({{coord|51|01|N|1|20|E}}) with the loss of 23 of her 29 crew.<ref name=UB55>{{cite web |url=http://uboat.net/wwi/boats/index.html?boat=UB+55 |title=UB 55|publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Welbeck Hall|1914|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The ship was torpedoed and sunk in the Mediterranean Sea {{convert|75|nmi|km}} north east by north of Port Said by {{SMU|UB-53||6}} ({{navy|German Empire}}) with the loss of four of her crew.<ref name=NH33/><ref name=WH2>{{cite web |url=http://uboat.net/wwi/ships_hit/6482.html |title=Welbeck Hall |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list end}}

==23 April==
{{shipwreck list begin |date=23 April 1918 |sort=}}
{{shipwreck list item
|ship={{HMS|Brilliant|1891|6}}
|flag={{navy|UK}}
|desc=[[World War I]]: [[First Ostend Raid]]: The {{sclass|Apollo|cruiser|2}} was scuttled as a [[blockship]] at [[Ostend]], [[West Flanders]], Belgium.
}}
{{shipwreck list item
|ship={{HMS|C3}}
|flag={{navy|UK}}
|desc=World War I: [[Zeebrugge Raid]]: Packed with explosives, the [[British C-class submarine|C-class]] submarine was rammed into the a [[viaduct]] connecting the [[Mole (architecture)|mole]] to the shore at [[Zeebrugge]], [[West Flanders]], [[Belgium]], and detonated in order to destroy the viaduct.
}}
{{shipwreck list item
|ship=''Frances''
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[ketch]] was scuttled in the [[Atlantic Ocean]] ({{coord|46|33|N|12|05|W}}) by {{SMU|U-155||6}} ({{navy|German Empire}}) with the loss of two of her crew.<ref name=NH33/><ref name=Frances>{{cite web |url=http://uboat.net/wwi/ships_hit/7730.html |title=Frances |publisher=Uboat.net |access-date=27 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMS|Intrepid|1892|6}}
|flag={{Navy|UK}}
|desc=World War I: [[Zeebrugge Raid]]: The [[destroyer]] was scuttled at Zeebrugge in an attempt to block the entrance to the [[Bruges Canal]].
}}
{{shipwreck list item
|ship={{HMS|Iphigenia|1891|6}}
|flag={{Navy|UK}}
|desc=World War I: [[Zeebrugge Raid]]: The destroyer was scuttled at Zeebrugge in an attempt to block the entrance to the Bruges Canal.
}}
{{shipwreck list item
|ship={{SS|Laurium|1896|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The coaster struck a mine and sank in the [[North Sea]] off the ''[[Inner Dowsing Lightship]]'' ({{flagcountry|UKGBI|government}}) with the loss of a crew member.<ref name=Laurium>{{cite web |url=http://uboat.net/wwi/ships_hit/3522.html |title=Laurium |publisher=Uboat.net |access-date=23 December 2012}}</ref>
}}
{{shipwreck list item
|ship=''HMML 110''
|flag={{navy|UK}}
|desc=The motor launch was lost on this date.<ref name=Navy22/>
}}
{{shipwreck list item
|ship=''HMML 424''
|flag={{navy|UK}}
|desc=The motor launch was lost on this date.<ref name=Navy22/>
}}
{{shipwreck list item
|ship={{HMS|North Star|1916|6}}
|flag={{navy|UK}}
|desc=World War I: [[Zeebrugge Raid]]: The {{sclass2|Admiralty M|destroyer|2}} was shelled and sunk at Zeebrugge by German shore-based artillery.<ref name=Navy22/><ref name=WWI18/>
}}
{{shipwreck list item
|ship=''Peregrine''
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The trawler was shelled and sunk in [[Yell Sound]] by {{SMU|U-19|Germany|6}} ({{navy|German Empire}}). Her crew survived.<ref name=Peregrine>{{cite web |url=http://uboat.net/wwi/ships_hit/4741.html |title=Peregrine |publisher=Uboat.net |access-date=27 September 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMT|Plethos}}
|flag={{navy|UK}}
|desc=World War I: The [[naval trawler]] struck a [[naval mine|mine]] and sank in the North Sea {{convert|40|nmi|km}} east north east of [[Montrose, Forfarshire]] with the loss of four of her crew.<ref name=Plethos>{{cite web |url=http://uboat.net/wwi/ships_hit/4818.html |title=Plethos |publisher=Uboat.net |access-date=21 October 2012}}</ref>
}}
{{shipwreck list item
|ship=''Restaurado''
|flag={{flag|Portugal}}
|desc=World War I: The sailing vessel was sunk in the Atlantic Ocean off the coast of Portugal by {{SMU|UB-105||6}} ({{navy|German Empire}}).<ref name=Restaurado>{{cite web |url=http://uboat.net/wwi/ships_hit/5092.html |title=Restaurado |publisher=Uboat.net |access-date=14 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMS|Sirius|1892|6}}
|flag={{navy|UK}}
|desc=World War I: [[First Ostend Raid]]: The {{sclass|Apollo|cruiser|2}} was scuttled as a blockship at Ostend.
}}
{{shipwreck list item
|ship={{HMS|Thetis|1890|6}}
|flag={{Navy|UK}}
|desc=World War I: [[Zeebrugge Raid]]: The {{sclass|Apollo|cruiser|2}} was scuttled at Zeebrugge in an attempt to block the entrance to the Bruges Canal.
}}
{{shipwreck list item
|ship=''Tyne Wave''
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The trawler was shelled and sunk in the North Sea {{convert|16|nmi|km}} north east of [[Ronas Voe]], [[Shetland Islands]] by {{SMU|U-19|Germany|6}} ({{navy|German Empire}}). Her crew survived.<ref name=TW>{{cite web |url=http://uboat.net/wwi/ships_hit/6182.html |title=Tyne Wave |publisher=Uboat.net |access-date=27 September 2012}}</ref>
}}
{{shipwreck list end}}

==24 April==
{{shipwreck list begin |date=24 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Agnete||2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was torpedoed and sunk in the [[English Channel]] {{convert|4|nmi|km}} south by west of [[Start Point, Devon]] by a [[Kaiserliche Marine]] submarine with the loss of twelve of her crew.<ref name=NH33/>
}}
{{shipwreck list item
|ship=''Leonor''
|flag={{flag|Portugal}}
|desc=World War I: The trawler was scuttled in the [[Atlantic Ocean]] off the coast of Portugal by {{SMU|UB-105||6}} ({{navy|German Empire}}).<ref name=Leonor>{{cite web |url=http://uboat.net/wwi/ships_hit/3572.html |title=Leonor |publisher=Uboat.net |access-date=14 November 2012}}</ref>
}}
{{shipwreck list item
|ship=''Mabrouska''
|flag={{Flag|France}}
|desc=World War I: The sailing vessel was sunk in the [[Mediterranean Sea]] ({{Coord|32|44|N|32|40|E}}) by {{SMU|UB-53||6}} ({{navy|German Empire}}).<ref name=Mabrouska>{{cite web |url=http://uboat.net/wwi/ships_hit/3797.html |title=Mabrouska |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list end}}

==25 April==
{{shipwreck list begin |date=25 April 1918 |sort=}}
{{shipwreck list item
|ship={{HMS|Cowslip|1917|6}}
|flag={{navy|UK}}
|desc=[[World War I]]: The {{sclass|Anchusa|sloop|2}} was sunk in the [[Atlantic Ocean]] off [[Cape Spartel]], [[Spanish Morocco|Morocco]] by {{SMU|UB-105||6}} ({{navy|German Empire}}) with the loss of six of her 93 crew.<ref name=Cowslip>{{cite web |url=http://uboat.net/wwi/ships_hit/1477.html |title=Cowslip |publisher=Uboat.net |access-date=14 November 2012}}</ref>
}}
{{shipwreck list item
|ship=''Joseph''
|flag={{flag|France}}
|desc=World War I: The sailing vessel was sunk in the [[English Channel]] off [[Cherbourg]], [[Seine-Inférieure]] by {{SMU|UB-31||6}} ({{navy|German Empire}}).<ref name=Joseph>{{cite web |url=http://uboat.net/wwi/ships_hit/3196.html |title=Joseph |publisher=Uboat.net |access-date=2 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Sevilla|1913|2}}
|flag={{flag|Norway}}
|desc=World War I: The cargo ship was sunk in the English Channel {{convert|3|nmi|km}} north west of [[Berry Head]], [[Devon]], [[United Kingdom of Great Britain and Ireland|United Kingdom]] ({{coord|50|24|N|3|23|W}}) by {{SMU|UB-80||6}} ({{navy|German Empire}}) with the loss of a crew member.<ref name=Sevilla>{{cite web |url=http://uboat.net/wwi/ships_hit/5539.html |title=Sevilla |publisher=Uboat.net |access-date=12 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Sote|1883|2}}
|flag={{flag|Sweden}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[North Sea]] off [[Flamborough Head]], [[East Riding of Yorkshire]], United Kingdom<ref>{{cite book |title=Svenska handelsflottans krigsförluster 1914-1920 |trans-title=Swedish Merchant Marine War losses 1914-1920 |language=Swedish |location=Stockholm |publisher=Kommerskollegium (Swedish Board of Trade) |year=1921 |pages=388–90}}</ref> by {{SMU|UC-64||6}} ({{navy|German Empire}}) with the loss of a crew member.<ref name=Sote>{{cite web |url=http://uboat.net/wwi/ships_hit/5659.html |title=Sote |publisher=Uboat.net |access-date=23 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMS|St. Seiriol}}
|flag={{navy|UK}}
|desc=World War I: The auxiliary [[minesweeper (ship)|minesweeper]] struck a [[naval mine|mine]] and sank in the North Sea off the ''[[Shipwash Lightship]]'' ({{flagcountry|UKGBI|government}}) with the loss of twelve of her crew.<ref name="St.S">{{cite web |url=http://uboat.net/wwi/ships_hit/5737.html |title=St. Seiriol|publisher=Uboat.net |access-date=18 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SMU|U-104||6}}
|flag={{navy|German Empire}}
|desc=World War I: The [[German Type U 57 submarine|Type U 57]] [[submarine]] was depth charged and sunk in [[St. George's Channel]] ({{coord|51|59|N|6|26|W}}) by {{USS|Cushing|DD-55|6}} ({{navy|USA|1912}}) and {{HMS|Jessamine}} ({{navy|UK}}) with the loss of 41 of her 42 crew.
}}
{{shipwreck list item
|ship={{HMS|Willow Branch}}
|flag={{navy|UK}}
|desc=World War I: The [[Q-ship]] was sunk in the Atlantic Ocean off [[Ras Nouadhibou|Cabo Blanco]], Mauritania ({{coord|21|00|N|17|56|W}}) by {{SMU|U-153||6}} and {{SMU|U-154||6}} (both {{navy|German Empire}}) with the loss of 58 of her crew.<ref name=WB>{{cite web |url=http://uboat.net/wwi/ships_hit/6552.html |title=Willow Branch |publisher=Uboat.net |access-date=26 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{ship|HM Torpedo Boat|90}}
|flag={{navy|UK}}
|desc=The [[torpedo boat]] capsized and sank off [[Gibraltar]].<ref name=WWI18/>
}}
{{shipwreck list end}}

==26 April==
{{shipwreck list begin |date=26 April 1918 |sort=}}
{{shipwreck list item
|ship={{ship||Angelina di Paola|brig|2}}
|flag={{flagcountry|Kingdom of Italy|civil}}
|desc=[[World War I]]: The [[brig]] was sunk in the [[Mediterranean Sea]] north of [[Cape San Vito]], [[Sicily]] by {{SMU|UB-68}} ({{navy|German Empire}}).<ref name=AdP>{{cite web |url=http://uboat.net/wwi/ships_hit/298.html |title=Angelin Di Paola |publisher=Uboat.net |access-date=11 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{ship||Ethel|1876 schooner|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[schooner]] was shelled and sunk in the [[Irish Sea]] {{convert|19|nmi|km}} north by east of the [[Smalls Lighthouse]] by {{SMU|U-91}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=Ethel>{{cite web |url=http://uboat.net/wwi/ships_hit/7031.html |title=Ethel |publisher=Uboat.net |access-date=23 October 2012}}</ref>
}}
{{shipwreck list item
|ship=[[USS G-3 (SS-31)|USS G-3]]
|flag={{navy|United States|1912}}
|desc=The [[United States G-class submarine|G-class submarine]] ran aground on [[Eel Grass Shoal]] near [[Fishers Island, New York]]. Refloated and returned to service<ref name=":0"/>
}}
{{shipwreck list item
|ship={{SS|Leopold d'Or|1917|2}}
|flag={{flag|France}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Tyrrhenian Sea]] off [[San Pietro Island]], Italy ({{coord|39|55|N|7|02|E}}) by {{SMU|UB-48}} ({{navy|German Empire}}).<ref name=LO>{{cite web |url=http://uboat.net/wwi/ships_hit/7723.html |title=Leopold d'Or |publisher=Uboat.net |access-date=8 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Llyngwair|1913|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[collier (ship type)|collier]] was torpedoed and sunk in the North Sea {{convert|5|nmi|km}} south south east of [[Seaham Harbour]], [[County Durham]] by {{SMU|UC-64}} ({{navy|German Empire}}) with the loss of eight of her crew.<ref name=Navy12/><ref name=Llyngwair>{{cite web |url=http://uboat.net/wwi/ships_hit/3654.html |title=Llyngwair |publisher=Uboat.net |access-date=23 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Westerly||2}}
|flag={{flag|United States|1912}}
|desc=The steamer was sunk in a collision with {{SS|Lucidina||2}} ({{flagcountry|UKGBI|civil}}) off [[Brest, France]].<ref name=":1"/><ref>{{cite web |url=https://www.wrecksite.eu/wreck.aspx?161979 |title=Westerly (+1918) |publisher=Wrecksite |access-date=24 September 2020}}</ref>
}}
{{shipwreck list end}}

==27 April==
{{shipwreck list begin |date=27 April 1918 |sort=}}
{{shipwreck list item
|ship=''Azizeh''
|flag={{flag|France}}
|desc=[[World War I]]: The sailing vessel was sunk in the [[Mediterranean Sea]] ({{coord|32|07|N|32|32|E}}) by {{SMU|UB-53||6}} ({{navy|German Empire}}).<ref name=Azizeh>{{cite web |url=http://uboat.net/wwi/ships_hit/593.html |title=Azizeh |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Gresham|1905|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Irish Sea]] {{convert|18|nmi|km}} north west by north of [[Strumble Head]], [[Pembrokeshire]] ({{coord|52|14|N|5|05|W}}) by {{SMU|U-91||6}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=Gresham>{{cite web |url=http://uboat.net/wwi/ships_hit/2618.html |title=Gresham |publisher=Uboat.net |access-date=23 October 2012}}</ref>
}}
{{shipwreck list item
|ship=''Nemaat Kheda''
|flag={{flag|France}}
|desc=World War I: The sailing vessel was sunk in the Mediterranean Sea ({{Coord|32|07|N|32|32|E}}) by {{SMU|UB-53||6}} ({{navy|German Empire}}). Her crew survived.<ref name=NK>{{cite web |url=http://uboat.net/wwi/ships_hit/4340.html |title=Nemaat Kheda |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Romany|1902|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[tank ship|tanker]] was torpedoed and sunk in the Mediterranean Sea {{convert|47|nmi|km}} west south west of [[Cape Spartivento]], Italy, by {{SMU|UB-48||6}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=Romany>{{cite web |url=http://uboat.net/wwi/ships_hit/5182.html |title=Romany |publisher=Uboat.net |access-date=8 November 2012}}</ref>
}}
{{shipwreck list item
|ship=''Walpas''
|flag=[[File:Flag of the Russian SFSR.svg|25px]] [[Russian Soviet Federative Socialist Republic|Russia]]
|desc=World War I: The sailing vessel was sunk in the Irish Sea {{convert|15|nmi|km}} west by north of [[Bardsey Island]], Pembrokeshire by {{SMU|U-91||6}} ({{navy|German Empire}}).<ref name=Walpas>{{cite web |url=http://uboat.net/wwi/ships_hit/6430.html |title=Walpas |publisher=Uboat.net |access-date=23 October 2012}}</ref>
}}
{{shipwreck list end}}

==28 April==
{{shipwreck list begin |date=28 April 1918 |sort=}}
{{shipwreck list item
|ship=HM ''CMB-39B''
|flag={{navy|UK}}
|desc=The [[Coastal Motor Boat]] was lost on this date.<ref name=Navy12/>
}}
{{shipwreck list item
|ship={{SS|Damao|1911|2}}
|flag={{flag|Portugal}}
|desc=[[World War I]]: The cargo ship was sunk in [[St. George's Channel]] {{convert|12|nmi|km}} west of [[Bardsey Island]], [[Pembrokeshire]], [[United Kingdom of Great Britain and Ireland|United Kingdom]] by {{SMU|U-91}} ({{navy|German Empire}}).<ref name=Damao>{{cite web |url=http://uboat.net/wwi/ships_hit/1555.html |title=Damao |publisher=Uboat.net |access-date=23 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Elba|1899|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Atlantic Ocean]] {{convert|6|nmi|km}} north west of the [[Pendeen Lighthouse]] ({{coord|50|13|N|5|48|W}}) by {{SMU|UB-103}} ({{navy|German Empire}}) with the loss of ten of her crew.<ref name=Elba>{{cite web |url=http://uboat.net/wwi/ships_hit/1855.html |title=Elba |publisher=Uboat.net |access-date=13 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMT|Emley}}
|flag={{navy|UK}}
|desc=World War I: The [[naval trawler]] was sunk in the [[Firth of Forth]] south of the [[Isle of May]], [[Fife]] by {{SMU|UC-40}} ({{navy|German Empire}}) with the loss of eight of her crew.<ref name=Emley>{{cite web |url=http://uboat.net/wwi/ships_hit/1946.html |title=Emley |publisher=Uboat.net |access-date=10 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Kingstonian||2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: the cargo ship was torpedoed and sunk in Carloforte Bay by {{SMU|UB-48}} ({{navy|German Empire}}) with the loss of a crew member.<ref name=Dalkeith/>
}}
{{shipwreck list item
|ship={{ship|ST|Moose||2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The tug was torpedoed and sunk in Carloforte Bay by {{SMU|UB-48}} ({{navy|German Empire}}).<ref name=Dalkeith/>
}}
{{shipwreck list item
|ship={{SS|Oronsa|1906|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[passenger ship]] was torpedoed and sunk in St. George's Channel {{convert|12|nmi|km}} west of Bardsey Island by {{SMU|U-91}} ({{navy|German Empire}}) with the loss of three of her crew.<ref name=Oronsa>{{cite web |url=http://uboat.net/wwi/ships_hit/4588.html |title=Oronsa |publisher=Uboat.net |access-date=23 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Poitiers|1917|2}}
|flag={{Flag|France}}
|desc=World War I: The cargo ship was sunk in the Atlantic Ocean {{convert|4|nmi|km}} south west of [[Hartland Point]], [[Devon]], United Kingdom by {{SMU|U-60}} ({{navy|German Empire}}).<ref name=Poitiers>{{cite web |url=http://uboat.net/wwi/ships_hit/4826.html |title=Poitiers |publisher=Uboat.net |access-date=14 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Rimfakse|1909|2}}
|flag={{flag|Norway}}
|desc=World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean {{convert|10|nmi|km}} south west of Hartland Point ({{coord|50|54|N|4|35|W}}) by {{SMU|U-60}} ({{navy|German Empire}}). Her crew survived.<ref name=Rimfakse>{{cite web |url=http://uboat.net/wwi/ships_hit/5122.html |title=Rimfakse |publisher=Uboat.net |access-date=14 October 2012}}</ref>
}}
{{shipwreck list item
|ship=[[SS Saint Paul (1895)|USS ''Saint Paul'']]
|flag={{navy|United States|1912}}
|desc=The [[ocean liner]] turned on her side and sank at her pier at West Twenty-second Street, [[New York City, New York]] while undergoing conversion to a [[Troopship|troop transport]]. Later refloated, but the conversion was halted, and the vessel returned to her owners after the war ended, unrepaired. Two people were killed.<ref name=":0"/><ref>{{cite web |url=https://www.shipscribe.com/usnaux/ww1/ships/st-paul.htm |title=USS St. Paul (1898, 1918-19, ID # 1643) |publisher=shipscribe.com |access-date=20 April 2021}}</ref><ref name=":2"/>
}}
{{shipwreck list item
|ship={{SS|Upcerne|1906|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[North Sea]] {{convert|4|nmi|km}} south east by east of [[Coquet Island, England|Coquet Island]], [[Northumberland]] by {{SMU|UC-40}} ({{navy|German Empire}}) with the loss of sixteen of her crew.<ref name=Upcerne>{{cite web |url=http://uboat.net/wwi/ships_hit/6214.html |title=Upcerne |publisher=Uboat.net |access-date=10 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Verdun|1902|2}}
|flag={{flag|France}}
|desc=World War I: The cargo ship was sunk in the [[Gulf of Gabès]] {{convert|37|nmi|km}} east of [[Kerkennah]], [[French protectorate of Tunisia|Tunisia]] ({{coord|34|49|N|11|52|E}}) by {{SMU|UC-20}} ({{navy|German Empire}}).<ref name=Verdun>{{cite web |url=http://uboat.net/wwi/ships_hit/6298.html |title=Verdun |publisher=Uboat.net |access-date=27 November 2012}}</ref>
}}
{{shipwreck list end}}

==29 April==
{{shipwreck list begin |date=29 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Australier|1906|2}}
|flag={{Flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was torpedoed and sunk in the [[English Channel]] {{convert|6|nmi|km}} south west by south of [[Dungeness (headland)|Dungeness]], [[Kent]] ({{coord|50|52|N|0|58|E}}) by {{SMU|UB-57||6}} ({{navy|German Empire}}) with the loss of five of her crew.<ref name=Australier>{{cite web |url=http://uboat.net/wwi/ships_hit/567.html |title=Australier |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Broderick|1890|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the English Channel {{convert|7|nmi|km}} south south east of [[Hastings]], [[Sussex]] by {{SMU|UB-57||6}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=Broderick>{{cite web |url=http://uboat.net/wwi/ships_hit/966.html |title=Broderick |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{ship||Christiana Davis|schooner|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[schooner]] was shelled and sunk in the [[Atlantic Ocean]] {{convert|8|nmi|km}} south east by south of the [[Tuskar Rock, Ireland]] by {{SMU|U-105||6}} ({{navy|German Empire}}). Her crew survived.<ref name=CD>{{cite web |url=http://uboat.net/wwi/ships_hit/1263.html |title=Christiana Davis |publisher=Uboat.net |access-date=25 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{ship||City of Pensacola|schooner|2}}
|flag={{flag|United States|1912}}
|desc=World War I: The auxiliary four-masted [[schooner]] was sunk in the [[Mediterranean Sea]] off [[Garrucha]], [[Almería (province)|Almería]], Spain ({{coord|38|58|N|4|21|E}}) by {{SMU|UB-105||6}} ({{navy|German Empire}}). Her crew survived.<ref name=CoP>{{cite web |url=http://uboat.net/wwi/ships_hit/1308.html |title=City of Pensacola |publisher=Uboat.net |access-date=14 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{HMS|Dalkeith}}
|flag={{navy|UK}}
|desc=World War I: The [[tugboat|naval tug]] was sunk in the Mediterranean Sea off [[San Pietro Island]], Italy, by {{SMU|UB-48||6}} ({{navy|German Empire}}) with the loss of nine of her crew.<ref name=Dalkeith>{{cite web |url=http://uboat.net/wwi/ships_hit/1551.html |title=Dalkeith |publisher=Uboat.net |access-date=8 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Ellis Sayer||2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=The [[collier (ship type)|collier]] was lost on this date.<ref name=Navy12/>
}}
{{shipwreck list item
|ship={{SS|Frogner|1907|2}}
|flag={{flag|Norway}}
|desc=World War I: The cargo ship was sunk in the English Channel {{convert|3|nmi|km}} off [[Portland Bill]], [[Dorset]], [[United Kingdom of Great Britain and Ireland|United Kingdom]] by {{SMU|UC-17||6}} ({{navy|German Empire}}). Her crew survived.<ref name=Frogner>{{cite web |url=http://uboat.net/wwi/ships_hit/2313.html |title=Frogner |publisher=Uboat.net |access-date=25 November 2012}}</ref>
}}
{{shipwreck list item
|ship=''Johnny Toole''
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The [[ketch]] was shelled and sunk in the Atlantic Ocean {{convert|3|nmi|km}} south of the Tuskar Rock by {{SMU|U-105||6}} ({{navy|German Empire}}). Her crew survived.<ref name=JT>{{cite web |url=http://uboat.net/wwi/ships_hit/3190.html |title=Johnny Toole |publisher=Uboat.net |access-date=25 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Kut Sang|1905|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the Mediterranean Sea {{convert|40|nmi|km}} east south east of [[Cape Palos]], Spain, by {{SMU|UB-105||6}} ({{navy|German Empire}}) with the loss of 59 of her crew.<ref name=NH33/><ref name=KS>{{cite web |url=http://uboat.net/wwi/ships_hit/3399.html |title=Kut Sang |publisher=Uboat.net |access-date=14 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|La Somme|1882|2}}
|flag={{flag|France}}
|desc=World War I: The cargo ship was sunk in the English Channel {{convert|5|nmi|km}} west south west of Dungeness ({{coord|50|52|N|0|51|E}}) by {{SMU|UB-57||6}} ({{navy|German Empire}}) with the loss of a crew member.<ref name=LS>{{cite web |url=http://uboat.net/wwi/ships_hit/3451.html |title=La Somme |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship=''Maria''
|flag={{flagicon|Greece}} [[Kingdom of Greece|Greece]]
|desc=World War I: The vessel was sunk in the Mediterranean Sea ({{coord|35|38|N|13|20|E}}) by {{SMU|U-27|Austria-Hungary|6}} ({{navy|Austria-Hungary}}). Her crew survived.<ref name=Maria>{{cite web |url=http://uboat.net/wwi/ships_hit/3915.html |title=Maria |publisher=Uboat.net |access-date=30 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{ship|French submarine|Prarial||2}}
|flag={{navy|France}}
|desc=The {{sclass|Pluviose|submarine|2}} collided with the [[Steamship|steamer]] {{SS|Tropic||2}} ({{flagcountry|UKGBI|civil}}) in the [[English Channel]] off [[Le Havre]], [[Seine Maritime]], [[France]], and sank with the loss of nineteen of her 26 crew.<ref name=French>{{cite web|url=http://www.naval-history.net/WW1NavyFrench.htm |title=French Navy |publisher=Naval History |access-date=21 February 2013}}</ref>
}}
{{shipwreck list item
|ship={{SS|Saint Chamond|1913|2}}
|flag={{flag|France}}
|desc=World War I: The cargo ship was torpedoed and sunk in the Atlantic Ocean {{convert|14|nmi|km}} north of [[St Ives, Cornwall|St. Ives Head]], [[Cornwall]], United Kingdom ({{coord|50|15|N|5|30|W}}) by {{SMU|U-60||6}} ({{navy|German Empire}}). Her crew survived.<ref name="St.C">{{cite web |url=http://uboat.net/wwi/ships_hit/5310.html |title=Saint Chamond |publisher=Uboat.net |access-date=14 October 2012}}</ref>
}}
{{shipwreck list end}}

==30 April==
{{shipwreck list begin |date=30 April 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Conway|1901|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War]] I: The cargo ship was torpedoed and sunk in the [[Mediterranean Sea]] {{convert|38|nmi|km}} south of [[Cape Palos]], [[Murcia]], Spain ({{coord|37|10|N|0|28|W}}) by {{SMU|UB-105||6}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=Conway>{{cite web |url=http://uboat.net/wwi/ships_hit/1427.html |title=Conway |publisher=Uboat.net |access-date=14 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Ella Sayer|1898|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[English Channel]] {{convert|15|nmi|km}} east by north of the ''[[Royal Sovereign Lightship]]'' ({{coord|50|49|N|0|48|E}}) by {{SMU|UB-57||6}} ({{navy|German Empire}}) with the loss of two of her crew.<ref name=NH33/><ref name=ES>{{cite web |url=http://uboat.net/wwi/ships_hit/1894.html |title=Ella Sayer |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{ship|Soviet destroyer|Gnevnyy||2}}
|flag={{navy|Soviet Union}}
|desc=The {{sclass|Bespokoynyy|destroyer|2}} was shelled and damaged by German artillery off [[Usakov Bulk]] near [[Sevastopol]] and beached, she was scuttled by her crew. Salvaged by the Germans in the Summer of 1918 and commissioned as {{ship|German destroyer|R03||2}} ({{navy|German Empire}}).
}}
{{shipwreck list item
|ship={{SS|Isleworth|1896|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the English Channel {{convert|3|nmi|km}} south west of [[Ventnor]], [[Isle of Wight]] by {{SMU|UC-17||6}} ({{navy|German Empire}}) with the loss of 29 of her crew.<ref name=NH33/><ref name=Isleworth>{{cite web |url=http://uboat.net/wwi/ships_hit/3075.html |title=Isleworth |publisher=Uboat.net |access-date=25 November 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Kafue|1913|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the [[Irish Sea]] {{convert|11|nmi|km}} south west of the [[Mull of Galloway]], [[Wigtownshire]] by {{SMU|U-86||6}} ({{navy|German Empire}}) with the loss of a crew member.<ref name=NH33/><ref name=Kafue>{{cite web |url=http://uboat.net/wwi/ships_hit/3232.html |title=Kafue |publisher=Uboat.net |access-date=22 October 2012}}</ref>
}}
{{shipwreck list item
|ship=''Kalliope''
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The sailing vessel was sunk in the Mediterranean Sea {{convert|45|nmi|km}} off [[Alexandria]], Egypt, by {{SMU|UC-74||6}} ({{navy|German Empire}}).<ref name=Kalliope>{{cite web |url=http://uboat.net/wwi/ships_hit/3238.html |title=Kalliope |publisher=Uboat.net |access-date=29 December 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Kempock|1866|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The coaster was shelled and sunk in the Irish Sea {{convert|6.5|nmi|km}} south east by south of the [[Copeland Islands]] by {{SMU|U-86||6}} ({{navy|German Empire}}). Her crew survived.<ref name=NH33/><ref name=Kempock>{{cite web |url=http://uboat.net/wwi/ships_hit/3290.html |title=Kempock |publisher=Uboat.net |access-date=22 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SMU|UB-85||6}}
|flag={{navy|German Empire}}
|desc=World War I: The [[German Type UB III submarine|Type UB III]] [[submarine]] foundered in the [[Irish Sea]] off [[Belfast]], [[County Antrim]], [[United Kingdom of Great Britain and Ireland|United Kingdom]]. All 34 crew were rescued by {{HMS|Coreopsis|1917|6}} ({{navy|UK}}).
}}
{{shipwreck list item
|ship={{SS|Umba|1903|2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was torpedoed and sunk in the English Channel {{convert|1|nmi|km}} south of the ''[[Royal Sovereign Lightship]]'' ({{flagcountry|UKGBI|civil}}) by {{SMU|UB-57||6}} ({{navy|German Empire}}) with the loss of twenty of her crew.<ref name=NH33/><ref name=Umba>{{cite web |url=http://uboat.net/wwi/ships_hit/6198.html |title=Umba |publisher=Uboat.net |access-date=10 November 2012}}</ref>
}}
{{shipwreck list end}}

==Unknown date==
{{shipwreck list begin |date=Unknown date 1918 |sort=}}
{{shipwreck list item
|ship={{SS|Cicero||2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=[[World War I]]: The cargo ship was scuttled in the [[Baltic Sea]] to avoid capture by the Germans.<ref name=NH33/>
}}
{{shipwreck list item
|ship={{SS|Emilie||2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was scuttled in the [[Baltic Sea]] to avoid capture by the Germans.<ref name=NH33/>
}}
{{shipwreck list item
|ship={{ship||Michelet|barque|2}}
|flag={{flag|France}}
|desc=World War I: The [[barque]] was sunk in the [[Atlantic Ocean]] off the west coast of Africa on or about 25 April by {{SMU|U-154||6}} ({{navy|German Empire}}) with the loss of all 28 crew.<ref name=Michelet>{{cite web |url=http://uboat.net/wwi/ships_hit/4135.html |title=Michelet |publisher=Uboat.net |access-date=26 October 2012}}</ref>
}}
{{shipwreck list item
|ship={{SS|Obsidian||2}}
|flag={{flagcountry|UKGBI|civil}}
|desc=World War I: The cargo ship was scuttled in the [[Baltic Sea]] to avoid capture by the Germans.<ref name=NH33/>
}}
{{shipwreck list item
|ship={{ship|French submarine|Prarial||2}}
|flag={{navy|France}}
|desc=The submarine collided with a merchant vessel and sank with some loss of life.<ref name=Times020518a>{{Cite newspaper The Times |title=Imperial and Foreign news items. |date=2 May 1918 |page=5 |issue=41779 |column=E }}</ref>
}}
{{shipwreck list item
|ship={{SMU|UC-79||6}}
|flag={{navy|German Empire}}
|desc=World War I: The [[German Type UC II submarine|Type UC II]] [[submarine]] struck a [[naval mine|mine]] and sank in the [[English Channel]] off [[Cap Gris Nez]], [[Pas-de-Calais]], France during the first week of April with the loss of all 30 crew.<ref name=UC79>{{cite web |url=http://uboat.net/wwi/boats/index.html?boat=UC+791 |title=UC 790 |publisher=Uboat.net |access-date=30 December 2012}}</ref>
}}
{{shipwreck list end}}

==References==
{{reflist|2}}
{{WWI shipwrecks}}
{{shipevents|1918}}

[[Category:Lists of shipwrecks by year|1918-04]]
[[Category:Maritime incidents in 1918| 04]]