[AVGWarhawk]

When commissioned, the S-3 Class coastal and harbor defense submarine was 231' in length overall; had an extreme beam of 21'10"; had a normal surface displacement of 876 tons, and, when in that condition, had a mean draft of 13'1". Submerged displacement was 1,092 tons. The submarine was of riveted construction. The designed compliment was four officers and thirty-four enlisted men. The boat could operate safely to depths of 200 feet. The submarine was armed with four 21-inch torpedo tubes installed in the bow. Twelve torpedoes were carried. One 4-inch/50 caliber deck gun was installed. The full load of diesel oil carried was 36,950 gallons, which fueled two 1,000 designed brake horsepower four-cycle NELSECO type diesel engines built by the New London Ship and Engine Company at Groton, Connecticut...which could drive the boat, via a diesel direct drive propulsion system, at 15 knots on the surface in relatively calm seas. Power for submerged propulsion was provided by a main storage battery, divided into two sixty-cell batteries, manufactured by the Electric Storage Battery Company (EXIDE) at Philadelphia, Pennsylvania...which powered two 600 designed brake horsepower main propulsion motors manufactured by the Westinghouse Electric Company at Pittsburgh, Pennsylvania...which turned propeller shafts...which turned propellers...which could drive the submarine at 11 knots for a short period of time when operating beneath the surface of the sea. Slower submerged speeds resulted in greater endurances before the batteries needed to be recharged by the engines and generators.

I find the 11kts submerged very interesting:hmm: