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FIGHTING SHIPS OF THE WORLD
UNITED STATES OF AMERICA
SUBMARINES
MACKEREL submarine (1941), MARLIN submarine (1941)


Photo



Marlin

Ships


No Name Yard No Builder Laid down Launched Comm Fate Modification
SS204 Mackerel 38 Electric Boat, Groton 10.1939 28.9.1940 3.1941 stricken 11.1945 Mackerel
SS205 Marlin   Portsmouth N Yd 5.1940 29.1.1941 8.1941 stricken 11.1945 Marlin


Technical data


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

Complement42
Diving depth operational, m75 (designed), 90 (possible)


Standard scale images


<i>Mackerel</i> 1942
Mackerel 1942
<i>Marlin</i> 1944
Marlin 1944


Graphics


<i>Marlin</i>
Marlin


Project history

Mackerel class submarines (or M class) were designed as cheaper alternative for large Р, S and Т 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in comparison with "fleet" submarines (as often P and T classes were called), displacement, will replace become outdated S class.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.