I-7 
- TYPE: Submarine
- DISPLACEMENT SURFACED: 2,525 t (2,565 tnes)
- DISPLACEMENT SUBMERGED: 3,583 t (3,640 tnes)
- MACHINERY: Twin Screws, Diesel/Electric Motors;
11,200/2,800 hp - LENGTH: 358.6 ft (109.3 m)
- BEAM: 29.5 ft (9 m)
- DRAUGHT: 17 ft (5.2 m)
- PERFORMANCE SURFACED: 23 knots
- PERFORMANCE SUBMERGED: 8 knots
- ARMAMENT: 6 533mm TT; 1 140mm guns
- SURFACE RANGE: 14,337 nm (26,600 km)
at 16 knots - CREW: 100
- LAUNCHED: July 3, 1935