USS S-24

	USS S-24 (SS-129) in heavy seas, c. 1920s
History
United States
Name	S-24
Builder	Fore River Shipyard, Quincy, Massachusetts
Cost	$677,622.76 (hull and machinery)
Laid down	1 November 1918
Launched	27 June 1922
Sponsored by	Mrs. Eleanor Loper
Commissioned	24 August 1923
Decommissioned	10 August 1942
Identification	Hull symbol: SS-129; Call sign: NINN; ;
Fate	Transferred to United Kingdom, 10 August 1942
United Kingdom
Name	P555
Acquired	10 August 1942
Commissioned	October 1942
Decommissioned	May 1944
Fate	Returned to US Navy, December 1944; Scuttled, 25 August 1947;
General characteristics
Class & type	S-18-class submarine
Displacement	930 long tons (945 t) surfaced; 1,094 long tons (1,112 t) submerged;
Length	219 feet 3 inches (66.83 m)
Beam	20 ft 8 in (6.30 m)
Draft	17 ft 3 in (5.26 m)
Installed power	1,200 brake horsepower (895 kW) diesel; 2,375 hp (1,771 kW) electric;
Propulsion	2 × NELSECO diesel engines; 2 × Ridgway Dynamo & Engine Company electric motors; 2 × 60-cell batteries; 2 × Propellers;
Speed	14.5 knots (26.9 km/h; 16.7 mph) surfaced; 11 kn (20 km/h; 13 mph) submerged;
Range	3,420 nmi (6,330 km; 3,940 mi) at 6.5 kn (12.0 km/h; 7.5 mph) surfaced; 8,950 nmi (16,580 km; 10,300 mi) at 9.5 kn (17.6 km/h; 10.9 mph) surfaced with fuel in main ballast tanks; 20 hours at 5 knots (9 km/h; 6 mph) submerged;
Test depth	200 ft (61 m)
Capacity	41,921 US gallons (158,690 L; 34,907 imp gal) fuel oil
Complement	4 officers ; 34 enlisted;
Armament	4 × 21-inch (533 mm) torpedo tubes (12 torpedoes); 1 × 4-inch (102 mm)/50-caliber;

USS S-24 (SS-129) was an S-18-class submarine, also referred to as an S-1-class or "Holland"-type, of the United States Navy. During World War II, she was transferred to the Royal Navy as P.555.