Mackerel 1942
Marlin 1944
| No | Name | Yard No | Builder | Laid down | Launched | Comm | Fate |
| Mackerel | |||||||
| SS204 | Mackerel | 38 | Electric Boat, Groton | 10.1939 | 28.9.1940 | 3.1941 | stricken 11.1945 |
| Marlin | |||||||
| SS205 | Marlin | Portsmouth N Yd | 5.1940 | 29.1.1941 | 8.1941 | stricken 11.1945 | |
|
Displacement standard, t |
|
|
Displacement normal, t |
SS204: 940 / 1190 SS205: 910 / 1165 |
|
Length, m |
SS204: 74.1 SS205: 72.8 |
|
Breadth, m |
SS204: 6.73 SS205: 6.60 |
|
Draught, m |
SS204: 4.27 SS205: 3.96 |
|
No of shafts |
2 |
|
Machinery |
SS204: 4 Electric Boat diesels / 4 electric motors SS205: 4 Electric Boat diesel-generators / 4 electric motors |
|
Power, h. p. |
SS204: 3360 / 1500 SS205: 3400 / 1500 |
|
Max speed, kts |
SS204: 16.2 / 11 SS205: 16.5 / 11 |
|
Fuel, t |
diesel oil 116 |
|
Endurance, nm(kts) |
SS204: 6500(10) / SS205: 7400(10) / |
|
Armament |
1 x 1 - 76/50 Mk 21, 2 x 1 - 12.7/90, 6 - 533 TT (12, 4 bow, 2 stern) |
| Electronic equipment |
WBA, JK sonars |
|
Complement |
42 |
|
Diving depth operational, m |
75 (designed), 90 (possible) |
Project history: Mackerel class submarines (or M class) were designed as cheaper alternative for large Ð, S and Ò classes which dimensions called criticism of a number of General board members. It was considered, what exactly submarines with smaller, in comparison with "fleet" submarines (as often P and T classes were called), displacement, will replace become outdated S class.
Under the FY1940 program the building of two "prototypes" of M class was provided. The detailed design of the first (SS204) was fulfilled by Electric Boat, second (SS205) by Bureau of Construction. Being as a whole very similar, designs had a number of basic differences, in particular SS204 had machinery with direct drive, and SS-205 was diesel-electrical driven. Double-hulled.
As a whole submarines have appeared unsuccessful: at enough strong armament for their displacement their endurance appeared absolutely insufficient for operations on the Pacific, besides, limited dimensions have predetermined insufficient, to the USN, habitability. A planed building of the big series have refused, and commissioned in 1941 "prototypes" were used mainly for training.
Modernizations: 1942 - 1943, both: CT was rebuilt; - 1 x 1 - 76/50, 2 x 1 - 12.7/90; + 1 x 1 - 127/25 Mk 17, 2 x 1 - 20/70 Mk 4, SD, SJ radars
Naval service: No significant events.
Marlin
© Ivan Gogin, 2014-15