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FIGHTING SHIPS OF THE WORLD
UNITED STATES OF AMERICA
COASTAL FORCES
"PBR Mk I" river patrol boats (31RP661) (1966)


Photo



Vietnamese PBR Mk I 1970

Ships


Names Builders Commissioned Losses Transfers Discarding

31RP661-669

31RP6610-6699

31RP66100-66161

United BB, Bellingham: 31RP661-31RP66161

1966: 31RP661-66161

?

late 1960s, South Vietnam: nearly all

late 1980s: 4 units



Technical data


Displacement standard, t 
Displacement full, t6.5
Length, m

9.50

Breadth, m3.20
Draught, m0.60
No of shafts2 water-jet pumps
Machinery2 General Motors diesels
Power, h. p.432
Max speed, kts25
Fuel, tdiesel oil 0.6
Endurance, nm(kts) 
Armament1 x 2 - 12.7/90, 1 x 1 - 12.7/90, 1 x 1 - 60/12 M19 mortar, 1 x 1 - 40/10 M19 grenade launcher
Electronic equipmentnone
Complement4


Graphics


Vietnamese PBR Mk I 1970
Vietnamese PBR Mk I 1970


Project history

The Patrol Boat, River was smaller than the PCF, with an open-topped conning position, and had a fiberglass hull lined with plastic foam; it was propelled and steered by water-jets, for an extremely shallow draft (0.9m compared to 1.2m for a Swift). 

Modernizations

None.

Naval service

The great majority of US PBRs were transferred to South Vietnam. The PBRs were based afloat, LST846, 821, 838 and 786 being converted to support them. In 1994, twenty-seven PBR Mk II remained. Some had been used during the 1991 Gulf conflict.

© Ivan Gogin, 2015