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| Names | Builders | Commissioned | Losses | Transfers | Discarding | 
|---|---|---|---|---|---|
| 275 units | United BB, Bellingham, USA: 275 units | 1966-1970 // 1975: 275 units | none | none | 1988-1992: 275 units | 
| Displacement standard, t | |
|---|---|
| Displacement full, t | 6.5 - 7.1 | 
| Length, m | 9.50 - 9.70 | 
| Breadth, m | 3.20 - 3.60 | 
| Draught, m | 0.60 - 0.80 | 
| No of shafts | 2 water-jet pumps | 
| Machinery | 2 General Motors diesels | 
| Power, h. p. | 432 | 
| Max speed, kts | 25 | 
| Fuel, t | diesel oil 0.6 | 
| Endurance, nm(kts) | |
| Armament | 1 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 equipment | radar | 
| Complement | 4 | 
River patrol boats (PBR) with fiberglass (plastic) hulls, transferred to South Vietnam and captured by Vietnam People's Army.
None.
No significant events.

