USS Hardhead information

	USS Hardhead (SS-365) sometime after May 1953.
History
United States
Name	USS Hardhead
Namesake	Hardhead
Builder	Manitowoc Shipbuilding Company, Manitowoc, Wisconsin
Laid down	7 July 1943
Launched	12 December 1943
Commissioned	18 April 1944
Decommissioned	10 May 1946
Recommissioned	6 February 1952
Decommissioned	22 May 1952
Recommissioned	24 March 1953
Decommissioned	26 July 1972
Stricken	26 July 1972
Identification	SS-365
Fate	Transferred to Greece, 26 July 1972
Greece
Name	Papanikolis
Acquired	26 July 1972
Stricken	4 May 1993
Identification	S-114
Fate	Sold for scrap 1993
General characteristics
Class and type	Balao-class diesel-electric submarine
Displacement	1,526 tons (1,550 t) surfaced; 2,424 tons (2,463 t) submerged;
Length	311 ft 9 in (95.02 m)
Beam	27 ft 3 in (8.31 m)
Draft	16 ft 10 in (5.13 m) maximum
Propulsion	4 × Fairbanks-Morse Model 38D8-⅛ 10-cylinder opposed piston diesel engines driving electrical generators; 2 × 126-cell Sargo batteries; 4 × high-speed Elliott electric motors with reduction gears; two propellers ; 5,400 shp (4.0 MW) surfaced; 2,740 shp (2.0 MW) submerged;
Speed	20.25 knots (38 km/h) surfaced; 8.75 knots (16 km/h) submerged;
Range	11,000 nautical miles (20,000 km) surfaced at 10 knots (19 km/h)
Endurance	48 hours at 2 knots (3.7 km/h) submerged; 75 days on patrol;
Test depth	400 ft (120 m)
Complement	10 officers, 70–71 enlisted
Armament	10 × 21-inch (533 mm) torpedo tubes; 6 forward, 4 aft; 24 torpedoes; 1 × 5-inch (127 mm) / 25 caliber deck gun; Bofors 40 mm and Oerlikon 20 mm cannon;
General characteristics (Guppy IIA)
Class and type	none
Displacement	1,848 tons (1,878 t) surfaced; 2,440 tons (2,479 t) submerged;
Length	307 ft (93.6 m)
Beam	27 ft 4 in (8.3 m)
Draft	17 ft (5.2 m)
Propulsion	Snorkel added; One diesel engine and generator removed; Batteries upgraded to Sargo II;
Speed	Surfaced:; 17.0 knots (19.6 mph; 31.5 km/h) maximum; 13.5 knots (15.5 mph; 25.0 km/h) cruising; Submerged:; 14.1 knots (16.2 mph; 26.1 km/h) for ½ hour; 8.0 knots (9.2 mph; 14.8 km/h) snorkeling; 3.0 knots (3.5 mph; 5.6 km/h) cruising;
Armament	10 × 21 inch (533 mm) torpedo tubes; (six forward, four aft); all guns removed;

USS Hardhead (SS-365), a Balao-class submarine, was a ship of the United States Navy named for the hardhead, a fish of the croaker family.

^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Friedman, Norman (1995). U.S. Submarines Through 1945: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. pp. 285–304. ISBN 1-55750-263-3.
^ ^a ^b ^c ^d ^e ^f ^g Bauer, K. Jack; Roberts, Stephen S. (1991). Register of Ships of the U.S. Navy, 1775-1990: Major Combatants. Westport, Connecticut: Greenwood Press. pp. 275–280. ISBN 0-313-26202-0.
^ ^a ^b ^c ^d ^e ^f U.S. Submarines Through 1945 pp. 305-311
^ ^a ^b ^c ^d ^e Bauer, K. Jack; Roberts, Stephen S. (1991). Register of Ships of the U.S. Navy, 1775–1990: Major Combatants. Westport, Connecticut: Greenwood Press. pp. 275–280. ISBN 978-0-313-26202-9.
^ U.S. Submarines Through 1945 pp. 261–263
^ ^a ^b ^c U.S. Submarines Through 1945 pp. 305–311
^ ^a ^b ^c ^d ^e ^f ^g Friedman, Norman (1994). U.S. Submarines Since 1945: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. pp. 11–43. ISBN 1-55750-260-9.
^ ^a ^b ^c ^d U.S. Submarines Since 1945 pp. 242

[FriedmanSubs1-dates-1] ^ ^a ^b ^c ^d ^e ^f ^g ^h ⁱ ^j Friedman, Norman (1995). U.S. Submarines Through 1945: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. pp. 285–304. ISBN 1-55750-263-3.

[Register-2] ^ ^a ^b ^c ^d ^e ^f ^g Bauer, K. Jack; Roberts, Stephen S. (1991). Register of Ships of the U.S. Navy, 1775-1990: Major Combatants. Westport, Connecticut: Greenwood Press. pp. 275–280. ISBN 0-313-26202-0.

[FriedmanSubs1-specs-3] ^ ^a ^b ^c ^d ^e ^f U.S. Submarines Through 1945 pp. 305-311

[Register_275–280-4] Bauer, K. Jack; Roberts, Stephen S. (1991). Register of Ships of the U.S. Navy, 1775–1990: Major Combatants. Westport, Connecticut: Greenwood Press. pp. 275–280. ISBN 978-0-313-26202-9.

[FriedmanSubs1-engines_261–263-5] U.S. Submarines Through 1945 pp. 261–263

[FriedmanSubs1-specs_305–311-6] U.S. Submarines Through 1945 pp. 305–311

[FriedmanSubs2-chap2-7] ^ ^a ^b ^c ^d ^e ^f ^g Friedman, Norman (1994). U.S. Submarines Since 1945: An Illustrated Design History. Annapolis, Maryland: United States Naval Institute. pp. 11–43. ISBN 1-55750-260-9.

[FriedmanSubs2-specs-8] U.S. Submarines Since 1945 pp. 242

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History
USS Hardhead (SS-365) sometime after May 1953.
United States
Name	USS Hardhead
Namesake	Hardhead
Builder	Manitowoc Shipbuilding Company, Manitowoc, Wisconsin^[1]
Laid down	7 July 1943^[1]
Launched	12 December 1943^[1]
Commissioned	18 April 1944^[1]
Decommissioned	10 May 1946^[1]
Recommissioned	6 February 1952^[1]
Decommissioned	22 May 1952^[1]
Recommissioned	24 March 1953^[1]
Decommissioned	26 July 1972^[1]
Stricken	26 July 1972^[2]
Identification	SS-365
Fate	Transferred to Greece, 26 July 1972^[1]
Greece
Name	Papanikolis
Acquired	26 July 1972
Stricken	4 May 1993
Identification	S-114
Fate	Sold for scrap 1993
General characteristics
Class and type	Balao-class diesel-electric submarine^[2]
Displacement	1,526 tons (1,550 t) surfaced^[2] 2,424 tons (2,463 t) submerged^[2]
Length	311 ft 9 in (95.02 m)^[2]
Beam	27 ft 3 in (8.31 m)^[2]
Draft	16 ft 10 in (5.13 m) maximum^[2]
Propulsion	4 × Fairbanks-Morse Model 38D8-⅛ 10-cylinder opposed piston diesel engines driving electrical generators^[4]^[5] 2 × 126-cell Sargo batteries^[6] 4 × high-speed Elliott electric motors with reduction gears^[4] two propellers ^[4] 5,400 shp (4.0 MW) surfaced^[4] 2,740 shp (2.0 MW) submerged^[4]
Speed	20.25 knots (38 km/h) surfaced^[3] 8.75 knots (16 km/h) submerged^[3]
Range	11,000 nautical miles (20,000 km) surfaced at 10 knots (19 km/h)^[3]
Endurance	48 hours at 2 knots (3.7 km/h) submerged^[3] 75 days on patrol
Test depth	400 ft (120 m)^[3]
Complement	10 officers, 70–71 enlisted^[3]
Armament	10 × 21-inch (533 mm) torpedo tubes 6 forward, 4 aft 24 torpedoes^[6] 1 × 5-inch (127 mm) / 25 caliber deck gun^[6] Bofors 40 mm and Oerlikon 20 mm cannon
General characteristics (Guppy IIA)
Class and type	none
Displacement	1,848 tons (1,878 t) surfaced^[7] 2,440 tons (2,479 t) submerged^[7]
Length	307 ft (93.6 m)^[8]
Beam	27 ft 4 in (8.3 m)^[8]
Draft	17 ft (5.2 m)^[8]
Propulsion	Snorkel added^[7] One diesel engine and generator removed^[7] Batteries upgraded to Sargo II^[7]
Speed	Surfaced: 17.0 knots (19.6 mph; 31.5 km/h) maximum 13.5 knots (15.5 mph; 25.0 km/h) cruising Submerged: 14.1 knots (16.2 mph; 26.1 km/h) for ½ hour 8.0 knots (9.2 mph; 14.8 km/h) snorkeling 3.0 knots (3.5 mph; 5.6 km/h) cruising^[7]
Armament	10 × 21 inch (533 mm) torpedo tubes (six forward, four aft)^[8] all guns removed^[7]