USS BOWFIN (SS-287) SPECIFICATIONS

HULL:

Type:
Balao-class Submarine

Constructed:
Portsmouth Naval Shipyard, Kittery, Maine

Keel Laid:
23 July 1942

Launched:
7 December 1942, nicknamed, "The Pearl Harbor Avenger"

Sponsor:
Mrs. Jane Gawne, wife of CAPT James Orville Gawne, U.S. Navy, who was head of the Portsmouth Navy Shipyard

Commissioned:
1 May 1943

Complement:
Originally 70 men (7 officers & 63 enlisted), later increased to 80 men (8 officers & 72 enlisted)

Displacement:
1,810 tons (on surface); 2,415 tons (submerged)

Length:
311 feet 9.8 inches

Maximum Beam (widest point):
27 feet 3 inches

Mean Draft (depth to keel on surface):
15 feet 3 inches

Freeboard (distance from deck to surface of water):
12 feet 5 inches at bow 3 feet 11 inches at stern

Pressure Hull Maximum Diameter:
16 feet 3/8 inch

Torpedo Tubes:
6 tubes in forward torpedo room and 4 in aft torpedo room

Torpedoes:
24 total, 10 in tubes and 14 in reload racks. Primary torpedoes used were the Mark 14 and Mark 23, both steam driven. By the end of the war Bowfin was using the Mark 18 electric torpedo and Mark 27 acoustic torpedo nicknamed the cutie.

Guns:
Originally, one 4 inch 50-caliber and two 20 mms. Upgraded to, one 5 inch 25 caliber, one 40 mm and one 20 mm.

MACHINERY:

Main Engines:
Four General Motors Model 16-278A diesel, V-16

Main Generators:
Four General Electric 1,100 kw; 2,650 amps/415 volts propulsion; 3,600 amps/296 volts battery charging.

Main Motors:
Four General Electric 1,375 HP

Gears:
Combining and reduction type
2 -- 1,375 HP @ 1,300 RPM inputs
1 -- 2,740 HP @ 280 RPM output

Batteries:
Two 126-cell Exide type. Each cell was about 4.5 feet high, 1.25 feet deep, and 1.75 feet wide, and weighed about 1,650 pounds.

Maximum Speed:
20.25 knots surface speed; 8.75 knots submerged
23.3 MPH/37.5 KPH; 10 MPH/16.2 KPH

Propellers:
Two four-bladed, 8 foot diameter

Rudder:
One balanced streamlined type, limits 38 degrees to port and starboard.

Fuel Capacity:
Diesel, 54,000 gallons normal; 116,000 gallons maximum