USS PC 451
USS PC-451 was designed in 1938 and commissioned on 12 August 1940. Some 173 feet long, the 270-ton steel hulled diesel-powered subchaser could carry two 3″/50 DP guns, six 20mm guns, two Mk 20 Mousetrap projectors, two depth charge racks, and two K-gun depth charge throwers, all while making nearly 19 knots and just requiring a 65-man crew.