USS Mackerel (SS-204)
| Mackerel on 22 March 1941. | |
| History | |
|---|---|
| United States | |
| Name | Mackerel | 
| Builder | Electric Boat Company, Groton, Connecticut | 
| Laid down | 6 October 1939 | 
| Launched | 28 September 1940 | 
| Commissioned | 31 March 1941 | 
| Decommissioned | 9 November 1945 | 
| Stricken | 28 November 1945 | 
| Fate | Sold for scrap, 24 April 1947 | 
| General characteristics | |
| Class & type | Mackerel-class submarine | 
| Displacement | |
| Length | 243 ft 1 in (74.09 m) | 
| Beam | 22 ft 1 in (6.73 m) | 
| Draft | 13 ft ¼ in (4.0 m) | 
| Propulsion | 
 | 
| Speed | 
 | 
| Range | 6,500 nautical miles (12,000 km) at 10 knots (19 km/h) (service) | 
| Test depth | 250 ft (76 m) | 
| Complement | 4 officers, 33 enlisted | 
| Armament | 
 | 
USS Mackerel (SS-204), the lead ship of her class of submarines, was the first ship of the United States Navy named for the mackerel. Mackerel and her near-sister Marlin (designed and built by Portsmouth Navy Yard) were prototype small submarines which the Navy was exploring to replace the aging S-class submarines.