NAVYPEDIA



HOME
FIGHTING SHIPS OF THE WORLD
UNITED STATES OF AMERICA
COASTAL FORCES
"PBR Mk III" river patrol boats (31RP681) (1968 - 1973)


Photo



PBR Mk II

Ships


Names Builders Commissioned Losses Transfers Discarding

31RP681-689

31RP6810-6878

31RP691-699

31RP6910-6918

31RP701-709

31RP7010-7020

31RP711-719

31RP7110-7120

31RP721-728

31RP731-739

31RP7310

United BB, Bellingham: 31RP681-689, 31RP6810-6878, 31RP691-699, 31RP6910-6918, 31RP701-709, 31RP7010-7020, 31RP711-719, 31RP7110-7120, 31RP721-728, 31RP731-739, 31RP7310

1968: 31RP681-689, 31RP6810-6878

1969: 31RP691-699, 31RP6910-6918

1970: 31RP701-709, 31RP7010-7020

1971: 31RP711-719, 31RP7110-7120

1972: 31RP721-728

1973: 31RP731-739, 31RP7310

?

1973, South Vietnam: nearly all

late 1980s: 8 units of Mk II and Mk III types

1990s: 27 units of Mk II and Mk III types



Technical data


Displacement standard, t 
Displacement full, t7.1
Length, m

9.70

Breadth, m3.60
Draught, m0.80
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


PBR Mk II
PBR Mk II


Ship 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