United States N-class submarine

	USS N-7 (SS-59)
Class overview
Name	N class
Builders	Seattle Construction and Drydock Co., Seattle, Washington (N-1 to N-3); Lake Torpedo Boat Co., 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
Completed	7
Scrapped	7
General characteristics
Type	Submarine
Displacement	N-1 to N-3:; 347 long tons (353 t) surfaced; 414 long tons (421 t) submerged; N-4 to N-7:; 331 long tons (336 t) surfaced; 385 long tons (391 t) submerged;
Length	N-1 to N-3: 147 ft 3 in (44.88 m); N-4 to N-7: 155 ft (47 m);
Beam	N-1 to N-3: 15 ft 9 in (4.80 m); N-4 to N-7: 14 ft 6 in (4.42 m);
Draft	N-1 to N-3: 12 ft 6 in (3.81 m); N-4 to N-7: 12 ft 4 in (3.76 m);
Propulsion	Diesel-electric; N-1 to N-3:; 2 × NELSECO 240V8FS Diesel engines, 600 hp (450 kW) total,; 2 × Electro Dynamic electric motors, 300 hp (220 kW) total,; 2 × 60-cell batteries,; 2 × shafts; N-4 to N-7:; 2 × Busch-Sulzer Diesel engines, 600 hp (450 kW) total,; 2 × Diehl electric motors,300 hp (220 kW) total,; 2 × 60-cell batteries,; 2 × shafts;
Speed	13 knots (24 km/h; 15 mph) surfaced; 11 knots (20 km/h; 13 mph) submerged;
Test depth	200 ft (61 m)
Complement	N-1 to N-3: 25 officers and men; N-4 to N-7: 29 officers and men;
Armament	4 × 18-inch (450 mm) torpedo tubes, 8 torpedoes

The United States N-class submarines were a class of seven coastal defense submarines built for the United States Navy during World War I.

Class overview
USS N-7 (SS-59)
Name	N class
Builders	Seattle Construction and Drydock Co., Seattle, Washington (N-1 to N-3) Lake Torpedo Boat Co., 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
Completed	7
Scrapped	7
General characteristics
Type	Submarine
Displacement	N-1 to N-3: 347 long tons (353 t) surfaced 414 long tons (421 t) submerged N-4 to N-7: 331 long tons (336 t) surfaced 385 long tons (391 t) submerged
Length	N-1 to N-3: 147 ft 3 in (44.88 m) N-4 to N-7: 155 ft (47 m)
Beam	N-1 to N-3: 15 ft 9 in (4.80 m) N-4 to N-7: 14 ft 6 in (4.42 m)
Draft	N-1 to N-3: 12 ft 6 in (3.81 m) N-4 to N-7: 12 ft 4 in (3.76 m)
Propulsion	Diesel-electric N-1 to N-3: 2 × NELSECO 240V8FS Diesel engines, 600 hp (450 kW) total, 2 × Electro Dynamic electric motors, 300 hp (220 kW) total, 2 × 60-cell batteries, 2 × shafts N-4 to N-7: 2 × Busch-Sulzer Diesel engines, 600 hp (450 kW) total, 2 × Diehl electric motors,300 hp (220 kW) total, 2 × 60-cell batteries, 2 × shafts
Speed	13 knots (24 km/h; 15 mph) surfaced 11 knots (20 km/h; 13 mph) submerged
Test depth	200 ft (61 m)
Complement	N-1 to N-3: 25 officers and men N-4 to N-7: 29 officers and men
Armament	4 × 18-inch (450 mm) torpedo tubes, 8 torpedoes^[1]