Nahang Class Midget Submarine
| Name of the weapon | Nahang [whale] submarine |
| Operator | Iran |
| Status | In Service (potentially just as a prototype) |
| Number | 1 |
| Names | Nahang 1 |
| Cost | Unknown |
| Starting Service | March 2006 |
| Country of origin | Iran |
| Class | Multipurpose midget submarine |
| Manufacturer | Islamic Republic of Iran Defense Industries |
| Displacement | 350-400 tons |
| Propulsion | Diesel-Eletctric |
| Speed at water surface | 25 km / h |
| Speed below the water level | 44 km / h |
| Length | 72.2 ft (22 m) 25 meters / 85 feet |
| Beam | 3 meters |
| Height | 2.5 meters |
| Draft | Unknown |
| Dive Depth | Unknown |
| Hull Material | Steel |
| Fuel Capacity | Unknown |
| Range | Unknown |
| Crew | Unknown |
| Armament | 2 x external 533mm torpedo tubes |
| Missiles | missile launchers |
| Torpedoes | 2 to 4 torpedo tubes, Valfajr torpedo |
| Mines | primarily designed to covertly lay mines, unclear how many |
| Other | None |
| Sonar/Sensors | sonar and surface search radar |
| Countermeasures/Defenses | None |
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