Maritime Issues and Oceans

CSIS experts spotlight the maritime security environment in the Indo-Pacific, using regional experience and satellite imagery to provide leading analysis.

Photo: Planet Observer/Universal Images Group via Getty Images

Photo: Planet Observer/Universal Images Group via Getty Images

Navigating the Divide: Why the U.S. Navy Must Resume FONOPs in Indonesia

For nearly a decade, the U.S. has quietly acquiesced to Indonesia’s restrictive maritime claims to avoid diplomatic friction. This policy has failed. To prevent a catastrophic loss of access during a future crisis, the U.S. Navy must resume targeted Freedom of Navigation Operations.

Commentary by Patrick Panjeti — December 11, 2025

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Gregory B. Poling

Gregory B. Poling

Director and Senior Fellow, Southeast Asia Program and Asia Maritime Transparency Initiative
Harrison Prétat

Harrison Prétat

Deputy Director and Fellow, Asia Maritime Transparency Initiative
Joel Coito

Joel Coito

Military Fellow, Defense and Security Department

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Navigating the Divide: Why the U.S. Navy Must Resume FONOPs in Indonesia

For nearly a decade, the U.S. has quietly acquiesced to Indonesia’s restrictive maritime claims to avoid diplomatic friction. This policy has failed. To prevent a catastrophic loss of access during a future crisis, the U.S. Navy must resume targeted Freedom of Navigation Operations.

Commentary by Patrick Panjeti — December 11, 2025

Southeast Asia Radio

Energy Transitions and Climate Developments in Southeast Asia with Jenny Schuch-Page

Greg and Elina are joined by Jenny Schuch-Page to discuss regional energy transitions and climate developments after COP 30. Japhet and Lauren cover the latest from the region, from SCS naval drills to multifaceted cooperation from unlikely partners.

Podcast Episode by Gregory B. Poling, Lauren Mai, and Japhet Quitzon — December 4, 2025

CSIS Southeast Asia Radio

The U.S. Coast Guard and the Future of Maritime Cybersecurity

With nearly $25 billion in the One Big Beautiful Bill Act, a deep bench of cyber executive leaders, and recently expanded cyber authorities, the Coast Guard is poised to make generational improvements in maritime cybersecurity while bolstering its own cyber workforce.

Commentary by Joel Coito — October 23, 2025

The Latest on Southeast Asia: South China Sea Updates

Tensions between China and the Philippines have been elevated for more than two months in the South China Sea and show no signs of abating.

Blog Post by Julia Rocio Gatdula, Lauren Mai, and Gregory B. Poling — October 23, 2025

Congressional Perspectives on Maritime Security

Please join the CSIS Defense and Security Department (DSD) and the U.S. Naval Institute (USNI) for a Maritime Security Dialogue event featuring Senator Tim Kaine (D-VA) and Senator Tim Sheehy (R-MT).

Event — October 7, 2025