Patrol Ship Multi-Mission

Class overview

Name:	PSMM Mk5 Multi Mission Patrol Ship
Builders:	Tacoma Boatbuilding Company, Korea Tacoma Marine Industries Ltd., Taiwan's China Shipbuilding Co.
Preceded by:	Asheville class gunboat
General characteristics
Type:	PSMM Patrol Ship Multi Mission
Displacement:	240 tons
Length:	50.14 m
Beam:	7.26 m
Draft:	3.05 m
Propulsion:	Combined diesel or gas (CODOG) System Lycoming TF-40A model gas turbine GM 12V149 TI-type diesel engine
Speed:	38 knots maximum on turbine
Range:	5000 km on diesel
Complement:	Six officers, 32 enlisted
Sensors and processing systems:	Honeywell/Hughes H-930 (Mk 93)Mod2. Combat System
Armament:	Missiles: 4 × Hsiung Feng anti-ship missile/ Exocet MM-38 SSM Guns: 1 × 76 mm cannon; 1 × Bofors 40 mm/70 Mk 10

The PSMM Mk5 multi-purpose patrol boat class gunboat were a class of small military ships built for the United States Navy based on the Asheville class gunboat. The class is called Patrol Ship Multi Mission. The class was used by South Korean, Indonesia, Taiwan and Thailand Navies.

PSMM Mk5 multi-purpose patrol boat class gunboats employed a Combined diesel or gas turbine (CODOG) propulsion system; twin GM 12V149 Diesels for endurance, and a Lycoming TF-40A gas turbine for high-speed dash.

Ships

Republic of Korea Navy

PGM 581 Paek Ku 52 delivered 14-Mar-75
PGM 582 Paek Ku 53 delivered 14-Mar-75
PGM 584 Paek Ku 55 delivered 1-Feb-76
PGM 585 Paek Ku 56 delivered 1-Feb-76
PGM 586 - built in South Korea
PGM 587 - built in South Korea
PGM 589 - built in South Korea
PGM 591 - built in South Korea

Republic of China Navy

Lung Chiang PGG 601 delivered 15-May-78
Suijiang PGG 602 built in Taiwan

Republic of Indonesia Navy

Mandau class missile FAC made in South Korea by Korea-Tacoma in Masan with Exocet MM-38

Displacement: 290 tons full load
Dimensions: 53.58 x 8 x 1.63 meters/175.8 x 26.2 x 5.3 feet
Propulsion: 2 shafts; 2 cruise diesels, 2,240 bhp; 1 boost gas turbine, 25,000 shp, 41 knots
Crew: 43
Fire Control: WM-28
EW: DR-200S Mk1 intercept
Armament: 4 MM38 Exocet SSM, 1 57mm/70cal DP, 1 40 mm, 2 20 mm

Number Name Year
KRI Mandau 621 1979
KRI Rencong 622 1979
KRI Badik 623 1980
KRI Keris 624 1980

Kingdom of Thailand Navy

Sattahip class built in Thailand

Displacement: 300 tons full load
Dimensions: 50.14 x 7.30 x 1.58 meters (164.5 x 24 x 5 feet)
Propulsion: 2 diesels, 2 shafts, 6,840 bhp, 22 knots
Crew: 56
Armament: 1 3/50 SP (76 mm OTO DP in 524-56), 1 40 mm, 2 20 mm, 2 12.7 mm MG

Number Name Year
PC 521 Sattahip 1983
PC 522 Klongyai 1984
PC 523 Takbai 1984
PC 524 Katang 1985
PC 525 Thepa 1986
PC 526 Thai Muang 1986

Notes

The previous posts suggest that these ships all had the same PSMM MK-5 designation and that they had the same propulsion plant. Not true. The Korean ships were designated PSMM-Mk1 for the first three ships and PSMM MK1A for the follow ships. ALL of the Korean ships were powered by (6) TF-36 (2800 HP) turbines. They were COGAG (Combination Gas Turbine and Gas Turbine. Any quantity (up to six) power plants could be operated at any time. There was no diesel power at all. There were two shafts and combining gearboxes port and stbd which accepted three turbines each. These ships went 44 knots at their fastest. The propellers were Liaan controllable pitch. The ships had two, 150 KW generators capable of parallel operation.

The ships built for Taiwan (ROC) were designated PSMM MK-5. They had three shafts with Liaan CP props. Each shaft had a Lycoming TF-40 gas turbine and a Detroit Diesel 1200 HP engine. The power plant was CODAG (Combination Diesel AND Gas Turbine) The ships could operate diesel only, turbine only, or combined. These ships displaced 270 tone, not 240 and went about 40 knots. They were much more difficult to operate full power than the MK-1 and MK-1A ships.

Thailand never used this ship. They used a purely diesel powered boat with which I was not connected.

People looking for verification can contact me. I was the trials chief engineer in Tacoma and the project manager for the foreign builds.