"Impressed with the prototype, the Navy requested 120 such boats in less than 6 months. United Boatbuilders of Washington State ultimately won the contract with the lowest bid. The eventual Mark-I design incorporated a 31-foot fiberglass cruiser hull along with a completely new, Navy-designed superstructure. Twin General Motors 216 horsepower diesel engines powered the boat’s water propulsion system. Fully loaded, the boat weighed 14,600 pounds and could reach speeds of up to 25.7 knots. The original boats cost just $75,000 each."
Link to full article is below.
Papa, Bravo, Romeo: The PBR Story*|*Armed with Science