The ''Mackerel''-class submarines were a pair of experimental prototype

submarine A submarine (or sub) is a watercraft capable of independent operation underwater. It differs from a submersible, which has more limited underwater capability. The term is also sometimes used historically or colloquially to refer to remotely op ...

s built just prior to

World War II World War II or the Second World War, often abbreviated as WWII or WW2, was a world war that lasted from 1939 to 1945. It involved the vast majority of the world's countries—including all of the great powers—forming two opposin ...

and launched in 1940 and 1941. The two submarines were similar in size and capability to the S-class submarines built at the end of

World War I World War I (28 July 1914 11 November 1918), often abbreviated as WWI, was one of the deadliest global conflicts in history. Belligerents included much of Europe, the Russian Empire, the United States, and the Ottoman Empire, with fightin ...

, and had been ordered to test the feasibility of using mass production techniques to build small submarines. Until at least 1940 it was thought that mass production of

fleet submarine A fleet submarine is a submarine with the speed, range, and endurance to operate as part of a navy's battle fleet. Examples of fleet submarines are the British First World War era K class and the American World War II era ''Gato'' class. The t ...

s would be impractical, and in any case small submarines could provide area defense for submarine bases. Once it became apparent that there would be sufficient production of the more capable s, interest in the design waned and no additional small submarines were ordered. Submarine production standardized during the war on the ''Gato'' class and its successors, the and submarines. In some references, the ''Mackerel''s are called the "M class".

Design

The ''Mackerel''s stemmed from design studies ordered by the Navy's

General Board The General Board of the United States Navy was an advisory body of the United States Navy, somewhat akin to a naval general staff and somewhat not. The General Board was established by general order 544, issued on March 13, 1900 by Secretary ...

beginning in 1936, when Admiral

Thomas C. Hart Thomas Charles Hart (June 12, 1877July 4, 1971) was an admiral in the United States Navy, whose service extended from the Spanish–American War through World War II. Following his retirement from the navy, he served briefly as a United States Se ...

joined the Board and spearheaded the small submarine effort. At the time it was felt that mass production of large

s would be impractical. It was also felt necessary to replace the aging S, R, and O-class submarines, to provide area defense for submarine bases and operate in restricted waters. For the ''Mackerel''s, two somewhat different designs were produced by the

Electric Boat Company Electricity is the set of physical phenomena associated with the presence and motion of matter that has a property of electric charge. Electricity is related to magnetism, both being part of the phenomenon of electromagnetism, as described ...

and

Portsmouth Navy Yard The Portsmouth Naval Shipyard, often called the Portsmouth Navy Yard, is a United States Navy shipyard in Kittery on the southern boundary of Maine near the city of Portsmouth, New Hampshire. Founded in 1800, PNS is U.S. Navy's oldest continuou ...

.Friedman, pp. 224-227 As prototypes, ''Mackerel'' and ''Marlin'' were near-sisters rather than sisters. References agree that ''Mackerel'' used a

direct drive A direct-drive mechanism is a mechanism design where the force or torque from a prime mover is transmitted directly to the effector device (such as the drive wheels of a vehicle) without involving any intermediate couplings such as a gear train or ...

propulsion arrangement, but differ as to whether ''Marlin'' had direct drive or diesel-electric drive. Both had engine designs not used in other US Navy submarines; ''Mackerel'' an in-house Electric Boat design, ''Marlin'' an

ALCO The American Locomotive Company (often shortened to ALCO, ALCo or Alco) was an American manufacturer of locomotives, diesel generators, steel, and tanks that operated from 1901 to 1969. The company was formed by the merger of seven smaller locomo ...

locomotive design. By late 1941 it became apparent that fleet submarines could be mass-produced, and interest in small submarines began to wane. Interest in them was revived with the examination of the German ''U-570'', a

Type VII U-boat Type VII U-boats were the most common type of German World War II U-boat. 703 boats were built by the end of the war. The lone surviving example, , is on display at the Laboe Naval Memorial located in Laboe, Schleswig-Holstein, Germany. Conc ...

captured by the

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and loaned to the US. Also, Admiral Hart returned to the General Board in late 1942, following a courageous part in the ultimately futile defense of the

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and

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in 1941-42. He pointed out that no other navy had abandoned small submarines. However, Admiral

Frederick J. Horne Admiral Frederick Joseph Horne (February 14, 1880 – October 18, 1959) was a four-star admiral in the United States Navy. As the first Vice Chief of Naval Operations, he directed all Navy logistics during World War II. Early career Horne w ...

Vice Chief of Naval Operations The vice chief of naval operations (VCNO) is the second highest-ranking commissioned United States Navy officer in the United States Department of the Navy, Department of the Navy and functions as the principal deputy of the Chief of Naval Opera ...

, felt that small submarines should only be built if there was no interference with fleet submarine production. With all submarine yards capable of building fleet submarines, there was no easy way to avoid impacting their production, so the small submarine was abandoned as a concept.Friedman, pp. 228-231

Service

Both submarines spent their entire careers operating from Submarine Base New London,

Connecticut Connecticut () is the southernmost state in the New England region of the Northeastern United States. It is bordered by Rhode Island to the east, Massachusetts to the north, New York to the west, and Long Island Sound to the south. Its cap ...

and

in training and research roles, contributing to the development of both submarine and

antisubmarine warfare Anti-submarine warfare (ASW, or in older form A/S) is a branch of underwater warfare that uses surface warships, aircraft, submarines, or other platforms, to find, track, and deter, damage, or destroy enemy submarines. Such operations are typic ...

. On 12 April 1942 ''Mackerel'' was attacked by a

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U-boat U-boats were naval submarines operated by Germany, particularly in the First and Second World Wars. Although at times they were efficient fleet weapons against enemy naval warships, they were most effectively used in an economic warfare role ...

while transiting to

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, but the torpedoes missed and ''Mackerels counter-attack was unsuccessful. ''Marlin'' appeared as the fictional ''Corsair'' in the 1943 movie ''

Crash Dive A crash dive is a maneuver by a submarine in which the vessel submerges as quickly as possible to avoid attack. Crash diving from the surface to avoid attack has been largely rendered obsolete with the advent of nuclear-powered submarines, as they ...

'', filmed at Submarine Base New London. After the war, both boats were decommissioned in November 1945 and scrapped in 1946-47.

Ships in class

References

Citations

Sources

* Alden, John D., Commander (USN, Ret). ''The Fleet Submarine in the U.S. Navy: A Design and Construction History''. Annapolis: Naval Institute Press, 1979. . * Lenton, H. T. ''American Submarines (Navies of the Second World War)'' (Doubleday, 1973), . * Silverstone, Paul H., ''U.S. Warships of World War II'' (Ian Allan, 1965), . * Gardiner, Robert and Chesneau, Roger, ''Conway's All the World's Fighting Ships 1922–1946'', Conway Maritime Press, 1980. . *

External links

* https://web.archive.org/web/20140322093118/http://www.fleetsubmarine.com/sublist.html
Navsource.org fleet submarines page

{{WWII US ships

Mackerel Mackerel is a common name applied to a number of different species of pelagic fish, mostly from the family Scombridae. They are found in both temperate and tropical seas, mostly living along the coast or offshore in the oceanic environment. ...

Mackerel