Surangkana-class destroyer escort

Surangkana class was the first destroyer escort of Royal Ayhtthaya Navy (RAYN), built by Naval Dockyard but program very slow because the budget crisis.

HAMS Surangkana was ordered in 1946, laid down in 1947, launched in 1949, and commissioned into RYAN in 2 January 1950. Reduce cost by cut some weapons and sensers, armed new or second hand weapons and sensers, base on a long hull variant of Tacoma class patrol frigate, she was only a ship in the class (but number 2).

Displacement: 1,670 tons (standard) 2,480 tons (full) Length: 96.3 m Beam: 11.98 m Draft: 4.21 m Propulsion: 2 × 6,000 shp turbines, 3 boilers, 2 shafts Speed: 21 knots Complement: 185

Sensors and processing systems: 1 x Radar Type 293M target indication 1 x Radar HACS 4in Gun Director 1 x Radar Type 285 anti-aircraft Gun Director 1 x Type 144 Sonar (Retractable)

Armament: 3 × QF Mk XVI 4in twin guns 2 × Bofors 40 mm L/60 single guns 6 x Oerlikon 20 mm twin gun 1 × Hedgehog anti-submarine mortar 4 × depth charge projectors 2 × depth charge racks

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Surangkana class in Korean War

North Korea Air Force have a thousand Mig-15s, HAMS Surangkana need to armed maximum AA guns, 4 x Bofors 40 mm L/60 single guns and 10 x Oerlikon 20 mm twin guns, removed an AFT QF Mk XVI 4in gun

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Surangkana class Mid-life upgrade

Sensors and processing systems: 1 x AN/SPS-6 air search radar 1 x AN/SPS-21 surface search radar 1 x WM22 Gun Director 1 x TDS 1 x AN/SQS-32 (AN/SQS-4 Mod 4) Sonar 1 x AN/WLR-1B Mod 1 ESM 4 x Mk 36 SRBOC Decoy 1 x IFF AN/UPX-12B

Armament: 1 × Mk-33 3"/50 twin guns 1 × Bofors 40 mm L/60 single guns 8 x Oerlikon 20 mm twin gun 1 × Terne III anti-submarine mortar 2× Mk 32 triple torpedo tubes (Mk 46 torpedoes) 2 × depth charge racks

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Surangkana class armed anti-ship missile

-replace Bofors 40 mm L/60 single gun by Bofors 40 mm L/70 single gun -replace depth charge racks by 6 x Penguin anti-ship missiles