After the war he renamed the company Harco Shipyard and built and sold a standard design motor boat.
[2][3] Harbor Boat Building Company built Pipit-class coastal minesweepers.
Powered by 630 hp (470 kW) Hall-Scott Defender V12 petrol engines with a top speed of 31.5 knots (58.3 km/h; 36.2 mph).
The boats had two rigid 795-US-gallon (3,010 L; 662 imp gal) United States Rubber Company bullet sealing fuel tanks.
[10][11][12][13][14][15][16][17] Harbor Boat Building Company built submarine chasers that were of the SC-497-class design.
The sub chasers were powered by two 1,540 brake horsepower (1,150 kW) General Motors, Electro-Motive Division, 16-184A diesel engines, and two propellers.
Some of the submarine chasers were lent to Allies of the United States as part of the Lend-Lease program.
These had a displacement of 49 tons, a length of 73 feet (22 m), and a top speed of 40 knots (74 km/h; 46 mph).