USS C-1

	Launching of USS Octopus, at the Fore River Shipbuilding Company, Quincy, Massachusetts, 4 October 1906
History
United States
Name	Octopus
Namesake	The octopus
Builder	Fore River Shipbuilding Company, Quincy, Massachusetts
Cost	$253,119.81 (hull and machinery)
Laid down	3 August 1905
Launched	4 October 1906
Sponsored by	Miss F. Webster
Commissioned	30 June 1908
Decommissioned	14 February 1910
Recommissioned	15 April 1910
Decommissioned	4 August 1919
Renamed	C-1 (Submarine No.9), 17 November 1911
Identification	Hull symbol: SS-9 (17 July 1920); Call sign: NMV; ;
Fate	Sold for scrapping, 13 April 1920
General characteristics
Class & type	C-class submarine
Displacement	238 long tons (242 t) surfaced; 275 long tons (279 t) submerged;
Length	105 ft 4 in (32.11 m)
Beam	13 ft 11 in (4.24 m)
Draft	10 ft 11 in (3.33 m)
Installed power	480 bhp (360 kW) (gasoline); 230 hp (170 kW) (electric);
Propulsion	2 × Craig Shipbuilding Company gasoline engine; 2 × Electro Dynamic electric motor; 2 × 60-cell battery; 2 × shaft;
Speed	11 kn (20 km/h; 13 mph) surfaced; 9 kn (17 km/h; 10 mph) submerged;
Range	776 nmi (1,437 km; 893 mi) at 8.13 kn (15.06 km/h; 9.36 mph) on the surface; 24 nmi (44 km; 28 mi) at 8 kn (15 km/h; 9.2 mph) submerged;
Test depth	200 feet (61.0 m)
Complement	1 officer; 14 enlisted;
Armament	2 × 18-inch (450 mm) bow torpedo tubes (4 torpedoes)

USS Octopus/C-1 (SS-9), also known as "Submarine No. 9", was the lead ship of her class of submarines built for the United States Navy in the first decade of the 20th century. As of October 2025, she has been the only boat in the USN named for the octopus.