The submarine O-7 (SS-68) of the US Navy.
Technical information
| Type | Submarine |
| Displacement | 521/629 BRT |
| Length | 172 feet |
| Complement | 2 + 27 men |
| Armament | Four 18", torpedo tubes, 8 torpedoes. one 3"/23 deck gun. |
| Max speed | 14/10.5 kts knots (surfaced/submerged) |
| Engines | New England Ship and Engine Co diesels, New York Navy Yard electric motors, 1 shaft |
| Power | 880 hp/740 hp (surfaced/submerged) |
| Notes on class | All laid up in the reserve fleet by the time of the Second World War. These old boats were unfit for fleet operations and were only used for training. |
All ships of the O-1 class
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| O-10 (SS-71) | ||
| O-3 (SS-64) | ||
| O-4 (SS-65) | ||
| O-6 (SS-67) | ||
 | O-2 (SS-63) | |
| | O-7 (SS-68) | |
| O-8 (SS-69) | ||
| | O-9 (SS-70) | Lost on 20 Jun 1941 |
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US Navy (more on See all Submarine classes.
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Books dealing with this subject include:
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