PBR (Patrol Boat, Riverine) boats had a fiberglass deep V-hull and two
big inboard diesel motors. There was a machine gun mount on the bow with
twin M60s, or a single 50 Cal. machine gun. Notice the minimal armor for
the aft gunner. All the boats of the MRF flew the flag 24 hours a day.
Dimensions (ft): 31 (length) x 10.5 (beam) x 2.5 (draft)
Displacement (tons): 7
Engines: 2 diesel/water jets
Speed (kts): 25.7 max/23 sustained