The US State Department has approved a possible Foreign Military Sale to Singapore for up to four P-8A Poseidon maritime patrol and reconnaissance aircraft, plus Mk 54 lightweight torpedoes and a wide package of sensors, software, spares, training, and sustainment support, at an estimated cost of $2.316 billion.
The potential order, notified to the US Congress by the Defense Security Cooperation Agency (DSCA), would significantly expand Singapore’s long-range maritime surveillance and anti-submarine warfare (ASW) capabilities.
The Boeing P-8 Poseidon is a multi-role maritime patrol aircraft based on the Boeing 737-800 commercial passenger airframe, equipped with a naval search radar for search and tracking capability. It can also be fitted, both internally and externally, with an array of armaments dedicated to submarine and anti-ship warfare, such as torpedoes, mines, depth charges, and anti-ship missiles.
What Singapore is seeking to buy
Under the proposed sale, the Government of Singapore has requested up to four Boeing P-8A Poseidon aircraft. The package includes a comprehensive mission systems suite, notably the AN/APY-10 maritime surveillance radar, AN/AQQ-2(V) acoustic system, MX-20HD electro-optical and infrared turret, and the AN/AAQ-24(V)N directional infrared countermeasures system.
Additional equipment covers identification friend or foe (IFF) transponders, electronic warfare management systems, countermeasures dispensers, cryptographic equipment, mission software, spare engines, training devices, and long-term logistics and engineering support.
Torpedoes and fielding support
The notification also includes eight Mk 54 Mod 0 lightweight torpedoes, with most of the hardware drawn directly from US Navy stocks. Support elements encompass exercise torpedoes, launch accessories, test equipment, publications, and in-country training to enable sustained ASW operations.
Boeing, headquartered in Arlington, Virginia, would act as the principal contractor, with multiple US Navy suppliers contributing subsystems and engineering services. No offset agreements have been disclosed at this stage.
Replacing Singapore’s Fokker 50 fleet
The approval aligns with Singapore’s previously stated intent to replace its maritime patrol aircraft fleet, centered on Fokker 50 airframes that have been in service since the early 1990s, with a more capable ASW-focused platform.
In September 2025, Singapore’s defense ministry said it had decided to acquire four P-8As as the first phase of a broader refresh of maritime security capabilities, aimed at improving maritime situation awareness and countering sub-surface threats.
