United States N-class submarine

	Portside view of USS N-7, underway in harbor, c. 1918-1922
Class overview
Name	N-1 class
Builders	Electric Boat Company design:; Seattle Construction and Drydock Company, Seattle, Washington (N-1 to N-3) (Electric Boat Company design); Lake Torpedo Boat Company design:; Lake Torpedo Boat Company, Bridgeport, Connecticut (N-4 to N-7);
Operators	United States Navy
Preceded by	AA-1 class
Succeeded by	O class
Built	1915–1917
In commission	1917–1926
Planned	7
Completed	7
Scrapped	7
General characteristics
Class & type	N-1-class (N-1 to N-3)
Type	Submarine
Displacement	347 long tons (353 t) surfaced; 414 long tons (421 t) submerged;
Length	147 ft 3 in (44.88 m)
Beam	15 ft 9 in (4.80 m)
Draft	12 ft 6 in (3.81 m)
Installed power	480 bhp (360 kW) diesel; 560 hp (420 kW) electric;
Propulsion	2 × NELSECO 240V8FS Diesel engines; 2 × Electro Dynamic electric motors; 2 × 60-cell batteries,; 2 × Propellors;
Speed	13 kn (24 km/h; 15 mph) surfaced; 11 kn (20 km/h; 13 mph) submerged;
Range	3,500 nmi (6,500 km; 4,000 mi) at 11 kn surfaced
Test depth	200 ft (61 m)
Complement	2 officers; 23 enlisted;
Armament	4 × 18 inch (450 mm) bow torpedo tubes (8 torpedoes)
General characteristics
Class & type	N-4-class (N-4 to N-7)
Type	Submarine
Displacement	331 long tons (336 t) surfaced; 385 long tons (391 t) submerged;
Length	155 ft 3 in (47.32 m)
Beam	14 feet 6 inches (4.42 m)
Draft	12 ft 4 in (3.76 m)
Installed power	600 bhp (450 kW) diesel; 300 hp (220 kW) electric;
Propulsion	Diesel-electric; 2 × Busch-Sulzer Diesel engines; 2 × Diehl electric motors; 2 × 60-cell batteries; 2 × Propellers;
Speed	13 kn surfaced; 11 kn submerged;
Test depth	200 ft
Complement	3 officers; 26 enlisted;
Armament	4 × 18-inch bow torpedo tubes, 8 torpedoes

The United States N-class submarines were a class of seven coastal defense submarines laid down for the United States Navy prior to the United States' entry into World War I. During the war they patrolled off of the New England coast.