Ratanakosin  
Initial Operational Capability (IOC): 1986
Total Production: 2
Also Known As: Type PFMM
Origin: United States of America
Parent System: Ratanakosin
Initial Operational Capability (IOC): 1986
Total Production: 2
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Description: The Royal Thai Navy Ratanakosin, also known as Type PFMM, class multi-purpose corvettes were designed and built in the United States of America to carry out anti-surface (ASuW), anti-submarine (ASW) and anti-air warfare (AAW). The propulsion system features two diesel engines developing 14,730-bhp and a top speed of 26 knots. The sensor package includes DA-05 air and surface search radar and DSQS-21C hull-mounted sonar. The weapon system consists of eight RGM-84 Harpoon anti-ship missiles, one Albatros air defense system with one 8-cell missile launcher 24 Aspide missiles, one OTO 76mm gun, one dual 40mm anti-aircraft gun, two 20mm guns and two triple 12.75-inch torpedo tubes. The Royal Thai Navy commissioned two ships in 1986 and 1987.

Ratanakosin Specifications

Crew: 87
Number of Engines: 2
Number of Weapons: 32
Torpedo Tubes: 6
Dimensions
Beam: 9.55 meter (31.3 foot)
Draft: 2.44 meter (8.01 foot)
Length: 77 meter (252 foot)
Main Gun Caliber: 76 millimeter
Power
Total Combined Power: 14,730 bhp (11.0 MW)
Speed
Top Speed: 26 knot (13.4 mps)
Weight
Full Displacement: 960 ton
CEP: Circular Error Probable
Meters (m)   Kilometers (km)   Nautic Miles (nm)   Inch (in)   Yard (yd)   Foot (ft)   Millimeter (mm)
Pound (lb)   Kilogram (kg)   kN (KiloNewton)   Ton (t)
Meters per Second (mps)   Kilometers per Hour (kph)   Knot (kt)   Miles per Hour (mph)
Liter (l)   Galon (gl)
Year (yr)   Minutes (min)   Second (sec)
Shaft-Horse-Power (shp)

Operators & Related Equipment


OperatorsItems

Grand Total 21
Cannons & Gear
76/62 Compactx1
Defensive Weapons
Aspidex24
Offensive Weapons
RGM-84D Harpoonx8
Protection Systems
Albatrosx1
Sensor Systems
LIROD-8x1

Ratanakosin Ship Listing


SerialNameStatusLaunch DateCommissionDecommission
441 Ratanakosin-1986-
442 Sukhothai-1987-

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