| Lead Boat: SS-170, U.S.S. Cachalot |
| Length: 274' |
| Beam: 24' 1" |
| Draft: 13' 10" (Surface trim) |
| Displacement: 1,100 tons (surfaced); 1,650 tons (submerged) |
| Speed: 17 knots (surfaced); 8 knots (submerged) |
| Diving Depth: 250' (test depth) |
| Range: 14,000 miles |
| Endurance: |
| Crew: 6 officers, 39 enlisted |
| Deck Gun: 1-3"/50-calibre |
| Anti-Aircraft Weapons: |
| Light Weaponry: |
| Torpedoes: 4-21" torpedo tubes (bow), 2-21" torpedo tubes (stern), 16 torpedoes |
| Engines: 2-1,535 hp main engines, 1-350 kw auxiliary |
| Motors: 2-800 hp |
| Radar: |
| Sonar: |
| Wartime Modifications: |
