Marsun Shipyard Designed Multirole Patrol Vessel Royal Thai Navy

07 Januari 2026

Commander of the Coast Guard Squadron, Royal Thai Navy, and his delegation visited Marsun Public Co Ltd to discuss ways to develop capabilities regarding Multi-purpose Patrol Vessels to replace decommissioned vessels in the future, as well as approaches to developing and improving vessels in the Coast Squadron that were built by Marsun Public Company Limited (photo: Royal Thai Navy)

During the Defense & Security 2025 exhibition of defense equipment and technology, held at Challenger Hall 1-2, IMPACT Exhibition Center, Muang Thong Thani, Nonthaburi, Thailand, from November 10-13, 2025, Marsun Public Company Limited (Thailand) discussed its business development strategy to focus more on export markets.

Marsun Thailand also informed that it is currently developing and designing a new "multirole patrol vessel" to meet the needs of the Royal Thai Navy, which has a strategic plan to reduce its ship classes and ship types in the future, as well as exploring the possibility of exporting, but did not provide further details.

The development of multi-purpose patrol vessels by Marsun has been clearly stated as a reality, as evidenced by the Coast Guard Squadron (CGS) of the Royal Thai Fleet (RTF) visiting Marsun on December 1, 2025, to discuss ways to develop capabilities for multi-purpose patrol vessels to replace decommissioned ones.

M21 Patrol Boat (infographic: Marsun)

Patrol Boat

Currently, the main naval forces of the Coast Guard Fleet are all ships built in Thailand, almost all using the Marsun Thai design, with the exception of the three T.81-class coastal patrol boats, the three T.111-class coastal patrol boats, and the two T.114-class coastal patrol boats with M36 Patrol Boat.

The coastal patrol vessels of the T.991 series (3 vessels), the coastal patrol vessels of the T.994 series (3 vessels), and the coastal patrol vessels of the T.997 series (2 vessels), the coastal patrol vessel of the T.227 series (1 vessel), and the coastal patrol vessels of the T.228 series (3 vessels).

The coastal patrol boats of the T.232 series (6 vessels), the coastal patrol boats of the T.261 series (4 vessels), the coastal patrol boats of the T.265 series (5 vessels), and the coastal patrol boats of the T.270 series (5 vessels) with M21 Patrol Boat.

M36 Patrol Boat (infographic: Marsun)

Missle Boat

Currently, the Coast Guard Fleet (CGF) likely has the full number of coastal patrol vessels (CPTs) and inshore patrol vessels (INVs) required for operational use. The Gulf Patrol Squadron (PS), another key naval force of the Royal Thai Fleet, is facing decommissioning and has a large number of its warships of various types nearing retirement in recent years. These vessels include:

-The three guided missile attack craft of the HTMS Prabparapak class (HTMS Prabparapak 311, HTMS Hanhaksatru 312, and HTMS Suphairin 313), and 

-The three guided missile attack craft of the HTMS Rajariddhi class (HTMS Rajariddhi 321, HTMS Wittayakhom 322, and HTMS Udomdet 323) have all been decommissioned.

Fast Attack Craft (FAC)

The fast gunboat (FAC) class of fast gunboats includes the three ships of the HTMS Chonburi class (HTMS Chonburi 331, HTMS Songkhla 332, and HTMS Phuket 333). The latest, HTMS Phuket, was decommissioned on October 1, 2025. HTMS Chonburi and HTMS Songkhla are expected to be gradually decommissioned in the following years, marking the end of the FAM class of fast gunboats in the Royal Thai Navy.

M58 Patrol Gun Boat (infographic: Marsun)

Patrol Craft (PC)

The patrol gunboat type is another type of ship under the Gulf Patrol Fleet, Royal Thai Navy, that is all built in Thailand, except for one patrol gunboat of the HTMS Laem Sing class (M58 patrol gun boat) built by the Thai shipyard Marsun, and three patrol gunboats of the HTMS Hua Hin class (HTMS Hua Hin 541, HTMS Klaeng 542 and HTMS Sriracha 543) which entered service in 2016 and 2001 respectively.

The six Sattahip-class gun patrol ships (HTMS Sattahip 521, HTMS Khlong Yai 522, HTMS Tak Bai 523, HTMS Kantang 524, HTMS Thepa 525, and HTMS Thaimueang 526) were commissioned from 1983-1986. This may also include the three Kamronsin-class anti-submarine patrol ships (HTMS Kamronsin 531, HTMS Thayan Chon 532, and HTMS Longlom 533), which were commissioned in 1992 under the 1st Frigate Squadron (1st FS).

Multi-purpose Patrol Vessel

To replace these vessels, the new multi-purpose patrol vessel will be larger than gun patrol boats but smaller than offshore patrol vessels, such as the two Pattani-class offshore patrol boats (HTMS Pattani 511 and HTMS Narathiwat 512) and the two Krabi-class offshore patrol boats (HTMS Krabi 551 and HTMS Prachuap Khiri Khan 552). They feature a modular design capable of supporting the installation of various mission modules adaptable to diverse missions in both peacetime and wartime, including unmanned surface vehicles (USVs).

(AAG)