In sailing and boating, a vessel's freeboard
is the distance from the waterline to the upper deck level, measured at the lowest point of sheer where water can enter the boat or ship. In commercial vessels, the latter criterion measured relative to the ship's load line, regardless of deck arrangements, is the mandated and regulated meaning.
In yachts, a low free board is often found on racing boats, for weight reduction and therefore increased speed. A higher free board will give more room in the cabin, but will increase weight and may compromise speed. A higher free board also helps weather waves and reduce the likelihood of being washed over by full water waves on the weather deck. A low free board boat is susceptible to taking in water in rough seas. Freighter ships and warships use high-free board designs to increase internal volume, which also allows them to satisfy IMO damage stability regulations due to increased reserved buoyancy.
Notes
References
Hayler, William B.; Keever, John M. (2003). American Merchant Seaman's Manual. Cornell Maritime Pr. ISBN0-87033-549-9.
If you find our videos helpful you can support us by buying something from amazon.
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Freeboard (nautical)
=======Image-Copyright-Info========
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LicenseLink: http://creativecommons.org/licenses/by-sa/3.0
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Image Source: https://en.wikipedia.org/wiki/File:Ship_length_measurements.svg
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published: 06 Jan 2016
Ship Terminology - - Ship Parts Names with Pictures #shipterms #shipparts
Ship terminology is as unique as it gets. From monkey island to poop deck, this video describes the ship parts names with pictures and videos as the ship terms are different from any other mode of transport.
For a maritime professional, it is extremely important to understand these ship terms as they are used in daily operations and repairs. A number of these ship terms are very commonly used and spoken of; however, the fact remains that the true meaning of a number of them are still not fully understood by even the smartest people.
Let’s take a look at some of the most commonly used ship terms and definitions. (Please do note that this is not an exhaustive list of ship terminology used on ships, but the important ones, we felt, need to be addressed.)
Plimsoll Marking or Loadlines are no...
published: 01 May 2020
Common Boating Words
This video is for you if you are shopping for a new or used boat and you don’t want to be fooled by a slick salesman? Or maybe you have recently bought one, and you don’t want to appear like a noob around the dock or ramp. Boating terms are different than cars and by the end of this video we want to help you learn them so you are more comfortable with the basic terms you will hear in the boating lingo world. Stick around to the end of the video when we provide a free download of a cheat sheet with these terms listed on a diagram. In this video we will cover:
1. The basic hull/bottom terms. 1:08
2. The basic boat locations/areas. 2:57
3. Basic boat measurements. 3:54
4. Other common nautical terms. 5:46
_______________________
Here is a video playlist with other help buying a boat:
▶...
published: 12 Dec 2019
Stability Unit, Part 1: Introduction to Stability
Content for Lake Superior State University (LSSU) course on Boat Handling and Navigation. Lectures by Captain Benjamin Hale, provided by Inland Seas Education Association.
published: 01 Jul 2013
Guide to Calculation Freeboard Mark follow International Convention on Load Lines - Naval Architect
Guide to Calculation Freeboard Mark follow International Convention on Load Lines - Naval Architect.
Shipbuilding. Ship building engineer
published: 02 Jan 2018
The Nude Latitude - Free Range Sailing Ep 31
The wind arrives so we say goodbye to the Northern Territory and set sail east across the Gulf of Carpentaria, destination Weipa in north-west Queensland. It’s our most interesting crossing yet despite being stuck in the doldrums for a significant amount of time!
Watch as we swim with a school of sharks, sail the edge of a storm system, catch a sailfish and some delicious tuna for the fridge. With temperatures remaining around 32º and humidity around 98% all day and all night, it's hardly surprising we do most of it in the nick!
The Binocular Fund: http://bit.ly/2Cpp1xz
Want more? Become our patron! https://www.patreon.com/freerangesailing
Follow us on instagram https://www.instagram.com/freerangesailing/
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Music Credit...
published: 03 Apr 2018
Talk Like A Sailor: Freeboard
Meet Dave Guay, Chief Engineer on our Mesabi Miner. He explains the nautical term "Freeboard" in today's installment of our September series "Talk Like A Sailor"!
published: 22 Sep 2019
Load Line on Ships- Plimsoll Line
#loadline #shipmarking #Plimsoll
This Video Explain the ship load line marking on the hull of a ship known as the Plimsoll line or the Plimsoll mark, which indicates the limit until which ships can be loaded with enough cargo. Internationally, the Plimsoll line on a ship is officially referred to as the International load line.
Ship load Line is a special marking positioned amidships. All vessels of 24 meters and more are required to have this Load line marking at the centre position of the length of summer load water line.
The complete Load line markings consist of 3 vital parts:
Deck Line – It is a horizontal line measuring 300mm by 25mm. It passes through the upper surface of the freeboard.
Load Line Disc – It is the 300mm diameter and 25mm thick round shaped disc. It is intersected...
If you find our videos helpful you can support us by buying something from amazon.
https://www.amazon.com/?tag=wiki-audio-20
Freeboard (nautical)
=======Imag...
If you find our videos helpful you can support us by buying something from amazon.
https://www.amazon.com/?tag=wiki-audio-20
Freeboard (nautical)
=======Image-Copyright-Info========
License: Creative Commons Attribution-Share Alike 3.0 (CC BY-SA 3.0)
LicenseLink: http://creativecommons.org/licenses/by-sa/3.0
Author-Info: Emoscopes
Image Source: https://en.wikipedia.org/wiki/File:Ship_length_measurements.svg
=======Image-Copyright-Info========
☆Video is targeted to blind users
Attribution:
Article text available under CC-BY-SA
image source in video
If you find our videos helpful you can support us by buying something from amazon.
https://www.amazon.com/?tag=wiki-audio-20
Freeboard (nautical)
=======Image-Copyright-Info========
License: Creative Commons Attribution-Share Alike 3.0 (CC BY-SA 3.0)
LicenseLink: http://creativecommons.org/licenses/by-sa/3.0
Author-Info: Emoscopes
Image Source: https://en.wikipedia.org/wiki/File:Ship_length_measurements.svg
=======Image-Copyright-Info========
☆Video is targeted to blind users
Attribution:
Article text available under CC-BY-SA
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Ship terminology is as unique as it gets. From monkey island to poop deck, this video describes the ship parts names with pictures and videos as the ship terms ...
Ship terminology is as unique as it gets. From monkey island to poop deck, this video describes the ship parts names with pictures and videos as the ship terms are different from any other mode of transport.
For a maritime professional, it is extremely important to understand these ship terms as they are used in daily operations and repairs. A number of these ship terms are very commonly used and spoken of; however, the fact remains that the true meaning of a number of them are still not fully understood by even the smartest people.
Let’s take a look at some of the most commonly used ship terms and definitions. (Please do note that this is not an exhaustive list of ship terminology used on ships, but the important ones, we felt, need to be addressed.)
Plimsoll Marking or Loadlines are not added in the video as we have a separate Video on it -
https://www.youtube.com/watch?v=6E0bT6B5Zm4
**Correction - Please read Moduled Depth @2:53
________________________
Stay connected with us!
► Subscribe to Marine Insight: http://bit.ly/2GUF1eM
► Like us on Facebook: https://www.facebook.com/marineinsight/
► Follow us on Twitter: https://twitter.com/marineinsight
► Follow us on Instagram: https://www.instagram.com/marine_insight/
► DOWNLOAD eBOOKS FOR SEAFARERS: https://learn.marineinsight.com/
Ship terminology is as unique as it gets. From monkey island to poop deck, this video describes the ship parts names with pictures and videos as the ship terms are different from any other mode of transport.
For a maritime professional, it is extremely important to understand these ship terms as they are used in daily operations and repairs. A number of these ship terms are very commonly used and spoken of; however, the fact remains that the true meaning of a number of them are still not fully understood by even the smartest people.
Let’s take a look at some of the most commonly used ship terms and definitions. (Please do note that this is not an exhaustive list of ship terminology used on ships, but the important ones, we felt, need to be addressed.)
Plimsoll Marking or Loadlines are not added in the video as we have a separate Video on it -
https://www.youtube.com/watch?v=6E0bT6B5Zm4
**Correction - Please read Moduled Depth @2:53
________________________
Stay connected with us!
► Subscribe to Marine Insight: http://bit.ly/2GUF1eM
► Like us on Facebook: https://www.facebook.com/marineinsight/
► Follow us on Twitter: https://twitter.com/marineinsight
► Follow us on Instagram: https://www.instagram.com/marine_insight/
► DOWNLOAD eBOOKS FOR SEAFARERS: https://learn.marineinsight.com/
This video is for you if you are shopping for a new or used boat and you don’t want to be fooled by a slick salesman? Or maybe you have recently bought one, and...
This video is for you if you are shopping for a new or used boat and you don’t want to be fooled by a slick salesman? Or maybe you have recently bought one, and you don’t want to appear like a noob around the dock or ramp. Boating terms are different than cars and by the end of this video we want to help you learn them so you are more comfortable with the basic terms you will hear in the boating lingo world. Stick around to the end of the video when we provide a free download of a cheat sheet with these terms listed on a diagram. In this video we will cover:
1. The basic hull/bottom terms. 1:08
2. The basic boat locations/areas. 2:57
3. Basic boat measurements. 3:54
4. Other common nautical terms. 5:46
_______________________
Here is a video playlist with other help buying a boat:
▶https://www.youtube.com/playlist?list=PLiYTkMUynMp4QaGI_lo5ys2YL5YOxgeGM
Check out the guide to used boat buying here:
▶https://blog.lenscove.com/used-boat-buying-guide-resources-to-help-you-make-the-right-choices
Check out our Boating Blog here:
▶https://blog.lenscove.com/blog
________________________
Connect with us!
▶https://lenscove.com
▶https://facebook.com/lenscove/
▶https://twitter.com/lenscovem
▶https://instagram.com/lenscovem
This video is for you if you are shopping for a new or used boat and you don’t want to be fooled by a slick salesman? Or maybe you have recently bought one, and you don’t want to appear like a noob around the dock or ramp. Boating terms are different than cars and by the end of this video we want to help you learn them so you are more comfortable with the basic terms you will hear in the boating lingo world. Stick around to the end of the video when we provide a free download of a cheat sheet with these terms listed on a diagram. In this video we will cover:
1. The basic hull/bottom terms. 1:08
2. The basic boat locations/areas. 2:57
3. Basic boat measurements. 3:54
4. Other common nautical terms. 5:46
_______________________
Here is a video playlist with other help buying a boat:
▶https://www.youtube.com/playlist?list=PLiYTkMUynMp4QaGI_lo5ys2YL5YOxgeGM
Check out the guide to used boat buying here:
▶https://blog.lenscove.com/used-boat-buying-guide-resources-to-help-you-make-the-right-choices
Check out our Boating Blog here:
▶https://blog.lenscove.com/blog
________________________
Connect with us!
▶https://lenscove.com
▶https://facebook.com/lenscove/
▶https://twitter.com/lenscovem
▶https://instagram.com/lenscovem
Content for Lake Superior State University (LSSU) course on Boat Handling and Navigation. Lectures by Captain Benjamin Hale, provided by Inland Seas Education A...
Content for Lake Superior State University (LSSU) course on Boat Handling and Navigation. Lectures by Captain Benjamin Hale, provided by Inland Seas Education Association.
Content for Lake Superior State University (LSSU) course on Boat Handling and Navigation. Lectures by Captain Benjamin Hale, provided by Inland Seas Education Association.
The wind arrives so we say goodbye to the Northern Territory and set sail east across the Gulf of Carpentaria, destination Weipa in north-west Queensland. It’s ...
The wind arrives so we say goodbye to the Northern Territory and set sail east across the Gulf of Carpentaria, destination Weipa in north-west Queensland. It’s our most interesting crossing yet despite being stuck in the doldrums for a significant amount of time!
Watch as we swim with a school of sharks, sail the edge of a storm system, catch a sailfish and some delicious tuna for the fridge. With temperatures remaining around 32º and humidity around 98% all day and all night, it's hardly surprising we do most of it in the nick!
The Binocular Fund: http://bit.ly/2Cpp1xz
Want more? Become our patron! https://www.patreon.com/freerangesailing
Follow us on instagram https://www.instagram.com/freerangesailing/
Follow us on FaceBook https://www.facebook.com/freerangesailing/
Music Credits
0:21 & 23:15 Blue Creek Trail - Dan Lebowitz (YouTube Audio Library)
2:43 To Hide Their Secrets - Chris Zabriskie (www.soundcloud.com/chriszabriskie)
4:13 I Won't Be Turned - Sven Karlsson (www.epidemicsound.com)
20:48 Iceland Journey Ending - Lobo Loco (www.freemusicharchive.org)
25:40 & onwards Get Away - Tatono (https://soundcloud.com/tatono)
Cruiser's Essential Reading
The Cruiser's Handbook of Fishing (Scott and Wendy Bannerot): http://amzn.to/2ycQTEA
Boatowner's Mechanical and Electrical manual (Nigel Calder): http://amzn.to/2xu8kSc
The 12 Volt Doctor's Practical Handbook: For the Boats Electric System (Edgar Beyn) http://amzn.to/2gq257p
Our Film Making Gear
SnapLens lenses and accessories for smartphone and tablet devices: http://www.snaplens.com.au/shop
DSLR Camera: http://amzn.to/2zbiPXZ
Wide-Angle lens: http://amzn.to/2gqwAtU
Polariser Filter: http://amzn.to/2yUxl5l
Prime lens: http://amzn.to/2g5KlBg
Tripod: http://amzn.to/2ycMb9N
Second Tripod: http://amzn.to/2ycUO42
The wind arrives so we say goodbye to the Northern Territory and set sail east across the Gulf of Carpentaria, destination Weipa in north-west Queensland. It’s our most interesting crossing yet despite being stuck in the doldrums for a significant amount of time!
Watch as we swim with a school of sharks, sail the edge of a storm system, catch a sailfish and some delicious tuna for the fridge. With temperatures remaining around 32º and humidity around 98% all day and all night, it's hardly surprising we do most of it in the nick!
The Binocular Fund: http://bit.ly/2Cpp1xz
Want more? Become our patron! https://www.patreon.com/freerangesailing
Follow us on instagram https://www.instagram.com/freerangesailing/
Follow us on FaceBook https://www.facebook.com/freerangesailing/
Music Credits
0:21 & 23:15 Blue Creek Trail - Dan Lebowitz (YouTube Audio Library)
2:43 To Hide Their Secrets - Chris Zabriskie (www.soundcloud.com/chriszabriskie)
4:13 I Won't Be Turned - Sven Karlsson (www.epidemicsound.com)
20:48 Iceland Journey Ending - Lobo Loco (www.freemusicharchive.org)
25:40 & onwards Get Away - Tatono (https://soundcloud.com/tatono)
Cruiser's Essential Reading
The Cruiser's Handbook of Fishing (Scott and Wendy Bannerot): http://amzn.to/2ycQTEA
Boatowner's Mechanical and Electrical manual (Nigel Calder): http://amzn.to/2xu8kSc
The 12 Volt Doctor's Practical Handbook: For the Boats Electric System (Edgar Beyn) http://amzn.to/2gq257p
Our Film Making Gear
SnapLens lenses and accessories for smartphone and tablet devices: http://www.snaplens.com.au/shop
DSLR Camera: http://amzn.to/2zbiPXZ
Wide-Angle lens: http://amzn.to/2gqwAtU
Polariser Filter: http://amzn.to/2yUxl5l
Prime lens: http://amzn.to/2g5KlBg
Tripod: http://amzn.to/2ycMb9N
Second Tripod: http://amzn.to/2ycUO42
Meet Dave Guay, Chief Engineer on our Mesabi Miner. He explains the nautical term "Freeboard" in today's installment of our September series "Talk Like A Sailor...
Meet Dave Guay, Chief Engineer on our Mesabi Miner. He explains the nautical term "Freeboard" in today's installment of our September series "Talk Like A Sailor"!
Meet Dave Guay, Chief Engineer on our Mesabi Miner. He explains the nautical term "Freeboard" in today's installment of our September series "Talk Like A Sailor"!
#loadline #shipmarking #Plimsoll
This Video Explain the ship load line marking on the hull of a ship known as the Plimsoll line or the Plimsoll mark, which ind...
#loadline #shipmarking #Plimsoll
This Video Explain the ship load line marking on the hull of a ship known as the Plimsoll line or the Plimsoll mark, which indicates the limit until which ships can be loaded with enough cargo. Internationally, the Plimsoll line on a ship is officially referred to as the International load line.
Ship load Line is a special marking positioned amidships. All vessels of 24 meters and more are required to have this Load line marking at the centre position of the length of summer load water line.
The complete Load line markings consist of 3 vital parts:
Deck Line – It is a horizontal line measuring 300mm by 25mm. It passes through the upper surface of the freeboard.
Load Line Disc – It is the 300mm diameter and 25mm thick round shaped disc. It is intersected by a horizontal line. The upper edge of the horizontal line marks the ‘Summer salt water line’ also known as ‘Plimsol Line’.
Load Lines – Load lines are horizontal lines extending forward and aft from a vertical line placed at a distance of 540mm from the centre of the disc. They measure 230mm by 23mm. The upper surfaces of the load lines indicate the maximum depths to which the ships maybe submerged in different seasons and circumstances.
It was in 1930, when the first International Load Line Convention took place, after which, it was periodically amended until the latest one that happened in 2003.
The fundamental purpose of a Load Line is to allot a maximum legal limit upto which a ship can be loaded by cargo. By prescribing such limits, the risk of having the vessel sailing with inadequate freeboard and buoyancy can be limited. A vessel should be having sufficient freeboard at all times, any exceptions made will result in insufficient stability and excessive stress on the ship’s hull. This is where load lines play an important role, as it makes the task of detecting whether the vessel is over-loaded and its freeboard tremendously easy and effortless.
#loadline #shipmarking #Plimsoll
This Video Explain the ship load line marking on the hull of a ship known as the Plimsoll line or the Plimsoll mark, which indicates the limit until which ships can be loaded with enough cargo. Internationally, the Plimsoll line on a ship is officially referred to as the International load line.
Ship load Line is a special marking positioned amidships. All vessels of 24 meters and more are required to have this Load line marking at the centre position of the length of summer load water line.
The complete Load line markings consist of 3 vital parts:
Deck Line – It is a horizontal line measuring 300mm by 25mm. It passes through the upper surface of the freeboard.
Load Line Disc – It is the 300mm diameter and 25mm thick round shaped disc. It is intersected by a horizontal line. The upper edge of the horizontal line marks the ‘Summer salt water line’ also known as ‘Plimsol Line’.
Load Lines – Load lines are horizontal lines extending forward and aft from a vertical line placed at a distance of 540mm from the centre of the disc. They measure 230mm by 23mm. The upper surfaces of the load lines indicate the maximum depths to which the ships maybe submerged in different seasons and circumstances.
It was in 1930, when the first International Load Line Convention took place, after which, it was periodically amended until the latest one that happened in 2003.
The fundamental purpose of a Load Line is to allot a maximum legal limit upto which a ship can be loaded by cargo. By prescribing such limits, the risk of having the vessel sailing with inadequate freeboard and buoyancy can be limited. A vessel should be having sufficient freeboard at all times, any exceptions made will result in insufficient stability and excessive stress on the ship’s hull. This is where load lines play an important role, as it makes the task of detecting whether the vessel is over-loaded and its freeboard tremendously easy and effortless.
If you find our videos helpful you can support us by buying something from amazon.
https://www.amazon.com/?tag=wiki-audio-20
Freeboard (nautical)
=======Image-Copyright-Info========
License: Creative Commons Attribution-Share Alike 3.0 (CC BY-SA 3.0)
LicenseLink: http://creativecommons.org/licenses/by-sa/3.0
Author-Info: Emoscopes
Image Source: https://en.wikipedia.org/wiki/File:Ship_length_measurements.svg
=======Image-Copyright-Info========
☆Video is targeted to blind users
Attribution:
Article text available under CC-BY-SA
image source in video
Ship terminology is as unique as it gets. From monkey island to poop deck, this video describes the ship parts names with pictures and videos as the ship terms are different from any other mode of transport.
For a maritime professional, it is extremely important to understand these ship terms as they are used in daily operations and repairs. A number of these ship terms are very commonly used and spoken of; however, the fact remains that the true meaning of a number of them are still not fully understood by even the smartest people.
Let’s take a look at some of the most commonly used ship terms and definitions. (Please do note that this is not an exhaustive list of ship terminology used on ships, but the important ones, we felt, need to be addressed.)
Plimsoll Marking or Loadlines are not added in the video as we have a separate Video on it -
https://www.youtube.com/watch?v=6E0bT6B5Zm4
**Correction - Please read Moduled Depth @2:53
________________________
Stay connected with us!
► Subscribe to Marine Insight: http://bit.ly/2GUF1eM
► Like us on Facebook: https://www.facebook.com/marineinsight/
► Follow us on Twitter: https://twitter.com/marineinsight
► Follow us on Instagram: https://www.instagram.com/marine_insight/
► DOWNLOAD eBOOKS FOR SEAFARERS: https://learn.marineinsight.com/
This video is for you if you are shopping for a new or used boat and you don’t want to be fooled by a slick salesman? Or maybe you have recently bought one, and you don’t want to appear like a noob around the dock or ramp. Boating terms are different than cars and by the end of this video we want to help you learn them so you are more comfortable with the basic terms you will hear in the boating lingo world. Stick around to the end of the video when we provide a free download of a cheat sheet with these terms listed on a diagram. In this video we will cover:
1. The basic hull/bottom terms. 1:08
2. The basic boat locations/areas. 2:57
3. Basic boat measurements. 3:54
4. Other common nautical terms. 5:46
_______________________
Here is a video playlist with other help buying a boat:
▶https://www.youtube.com/playlist?list=PLiYTkMUynMp4QaGI_lo5ys2YL5YOxgeGM
Check out the guide to used boat buying here:
▶https://blog.lenscove.com/used-boat-buying-guide-resources-to-help-you-make-the-right-choices
Check out our Boating Blog here:
▶https://blog.lenscove.com/blog
________________________
Connect with us!
▶https://lenscove.com
▶https://facebook.com/lenscove/
▶https://twitter.com/lenscovem
▶https://instagram.com/lenscovem
Content for Lake Superior State University (LSSU) course on Boat Handling and Navigation. Lectures by Captain Benjamin Hale, provided by Inland Seas Education Association.
The wind arrives so we say goodbye to the Northern Territory and set sail east across the Gulf of Carpentaria, destination Weipa in north-west Queensland. It’s our most interesting crossing yet despite being stuck in the doldrums for a significant amount of time!
Watch as we swim with a school of sharks, sail the edge of a storm system, catch a sailfish and some delicious tuna for the fridge. With temperatures remaining around 32º and humidity around 98% all day and all night, it's hardly surprising we do most of it in the nick!
The Binocular Fund: http://bit.ly/2Cpp1xz
Want more? Become our patron! https://www.patreon.com/freerangesailing
Follow us on instagram https://www.instagram.com/freerangesailing/
Follow us on FaceBook https://www.facebook.com/freerangesailing/
Music Credits
0:21 & 23:15 Blue Creek Trail - Dan Lebowitz (YouTube Audio Library)
2:43 To Hide Their Secrets - Chris Zabriskie (www.soundcloud.com/chriszabriskie)
4:13 I Won't Be Turned - Sven Karlsson (www.epidemicsound.com)
20:48 Iceland Journey Ending - Lobo Loco (www.freemusicharchive.org)
25:40 & onwards Get Away - Tatono (https://soundcloud.com/tatono)
Cruiser's Essential Reading
The Cruiser's Handbook of Fishing (Scott and Wendy Bannerot): http://amzn.to/2ycQTEA
Boatowner's Mechanical and Electrical manual (Nigel Calder): http://amzn.to/2xu8kSc
The 12 Volt Doctor's Practical Handbook: For the Boats Electric System (Edgar Beyn) http://amzn.to/2gq257p
Our Film Making Gear
SnapLens lenses and accessories for smartphone and tablet devices: http://www.snaplens.com.au/shop
DSLR Camera: http://amzn.to/2zbiPXZ
Wide-Angle lens: http://amzn.to/2gqwAtU
Polariser Filter: http://amzn.to/2yUxl5l
Prime lens: http://amzn.to/2g5KlBg
Tripod: http://amzn.to/2ycMb9N
Second Tripod: http://amzn.to/2ycUO42
Meet Dave Guay, Chief Engineer on our Mesabi Miner. He explains the nautical term "Freeboard" in today's installment of our September series "Talk Like A Sailor"!
#loadline #shipmarking #Plimsoll
This Video Explain the ship load line marking on the hull of a ship known as the Plimsoll line or the Plimsoll mark, which indicates the limit until which ships can be loaded with enough cargo. Internationally, the Plimsoll line on a ship is officially referred to as the International load line.
Ship load Line is a special marking positioned amidships. All vessels of 24 meters and more are required to have this Load line marking at the centre position of the length of summer load water line.
The complete Load line markings consist of 3 vital parts:
Deck Line – It is a horizontal line measuring 300mm by 25mm. It passes through the upper surface of the freeboard.
Load Line Disc – It is the 300mm diameter and 25mm thick round shaped disc. It is intersected by a horizontal line. The upper edge of the horizontal line marks the ‘Summer salt water line’ also known as ‘Plimsol Line’.
Load Lines – Load lines are horizontal lines extending forward and aft from a vertical line placed at a distance of 540mm from the centre of the disc. They measure 230mm by 23mm. The upper surfaces of the load lines indicate the maximum depths to which the ships maybe submerged in different seasons and circumstances.
It was in 1930, when the first International Load Line Convention took place, after which, it was periodically amended until the latest one that happened in 2003.
The fundamental purpose of a Load Line is to allot a maximum legal limit upto which a ship can be loaded by cargo. By prescribing such limits, the risk of having the vessel sailing with inadequate freeboard and buoyancy can be limited. A vessel should be having sufficient freeboard at all times, any exceptions made will result in insufficient stability and excessive stress on the ship’s hull. This is where load lines play an important role, as it makes the task of detecting whether the vessel is over-loaded and its freeboard tremendously easy and effortless.
In sailing and boating, a vessel's freeboard
is the distance from the waterline to the upper deck level, measured at the lowest point of sheer where water can enter the boat or ship. In commercial vessels, the latter criterion measured relative to the ship's load line, regardless of deck arrangements, is the mandated and regulated meaning.
In yachts, a low free board is often found on racing boats, for weight reduction and therefore increased speed. A higher free board will give more room in the cabin, but will increase weight and may compromise speed. A higher free board also helps weather waves and reduce the likelihood of being washed over by full water waves on the weather deck. A low free board boat is susceptible to taking in water in rough seas. Freighter ships and warships use high-free board designs to increase internal volume, which also allows them to satisfy IMO damage stability regulations due to increased reserved buoyancy.
Notes
References
Hayler, William B.; Keever, John M. (2003). American Merchant Seaman's Manual. Cornell Maritime Pr. ISBN0-87033-549-9.