Alaska class cruiser
Encyclopedia : A : AL : ALA : Alaska class cruiser
| |||
| Class | |||
|---|---|---|---|
| Lead ship | USS Alaska (CB-1) | ||
| Builders | New York Shipbuilding Corporation | ||
| Number of ships | 6 ordered, 3 laid down, 2 completed | ||
| General characteristics | |||
| Complement | 2,251 officers and enlisted | ||
| Armament | Nine 12 inch (305 mm), twelve 5 inch (127 mm), 56 x 40 mm, 34 x 20 mm guns | ||
| Aircraft | 4 | ||
| Displacement | 27,000 tons | ||
| Armor | 229 mm | ||
| Length | 806 ft 6 in (246 m) | ||
| Height | |||
| Draught | 27 ft 1 in (8.3 m) | ||
| Propulsion | 4-shaft General Electric steam turbines, 8 Babcock & Wilcox boilers | ||
| Performance | 150,000 shp (112 MW) | ||
| Speed | 31.4 knots (58 km/h) | ||
| Range | |||
The Alaska class of large cruisers was a series of two vessels built for service with the United States Navy during the later stages of World War II. The class was originally planned to consist of six vessels, although only two were completed. All were to be named after United States insular areas.
Description
The Alaska class ships are often referred to as large cruisers; in terms of gunnery and displacement they were midway between a heavy cruiser and a battleship, although closer to the former in terms of design and, particularly, armour coverage. Most authorities, including the United States Navy itself, therefore consider the Alaska-class vessels to have been unusually large cruisers rather than fully-fledged battlecruisers. In recognition of this intermediate role, the Navy named the individual vessels after US territories, rather than states (as was the tradition with battleships) or cities (cruisers).
Heavy cruiser development had been held steady between World War One and World War Two by the terms of the Washington Naval Treaty. In this treaty, the United States, Britain, Japan, France, and Italy had agreed to limit heavy cruisers to 10,000 tons displacement with 8-inch main armament. US "treaty cruisers" designed between the wars followed this pattern. After the Treaty lapsed in 1936, the designs were slightly enlarged into the Baltimore class cruisers.
The Alaska class were intended to serve as "cruiser-killers", in order to seek out and destroy this type of post-Treaty heavy cruiser. To facilitate this, they were given large guns of a new (and expensive) design, limited armor protection against 12" shells, and machinery capable of speeds up to 33 knots.
They resembled contemporary battleships in appearance and tonnage, with the familiar 2-A-1 main battery, massive columnar mast and cluster of 5"/38 DP guns along the sides of the superstructure. The easiest way to tell the Alaska class ships from the battleships was by the dual 5"/38 mount superfiring over the fore and aft main batteries. Additionally, while the battleships carried eight (older refitted ships) or ten (new build) 5"/38 dual mounts flanking the superstructure, the Alaskas only carried four, at the superstructure corners, plus the fore and aft superfiring mounts.
However, they were built to cruiser standards, with a cruiser-like secondary battery and lacked the armoured belt and torpedo defense system of capital ships. Their percentage of armor tonnage at 16% was similar to that of contemporary cruisers and far less than that of true battlecruisers and battleships (the HMS Hood had 33%, while the German Bismarck and USS North Carolina had 40% weight in armor). As with the never-completed Lexington class battlecruisers, the Alaska class ships were an outgrowth of contemporary American cruiser design, rather than being a new battlecruiser class to occupy the middle ground between heavy cruisers and fast battleships.
Changes in naval warfare during World War II meant that these ships never fulfilled this role. The traditional cruiser role of fleet scout was overtaken by aircraft carrier based scout planes. Like the contemporary Iowa-class fast battleships, their speed made them ultimately more useful as carrier escorts and bombardment ships than as the sea combatants they were developed to be, as well as the ignominious defeat of the fleets of Japanese heavy cruisers that were their raison d'être. In fact, the majority of enemy cruisers were sunk by aircraft or submarines instead of surface combat. Many regarded them as "white elephants" and a planned additional four ships were cancelled after completion of Alaska and Guam. A third vessel, Hawaii, was structurally completed but never fitted out.
History
Their operational life was brief. Both were commissioned in 1944, operated with the Fast Carrier Task Force as escorts during 1945, and saw limited shore bombardment duty. They were also assigned to the group that protected the damaged carrier USS Franklin (CV-13) off Japan. Neither saw further service, both being decommissioned in 1947. Mothballed, they were both sold for scrap in 1960.
Ships in class
Commissioned on 17 June 1944, Alaska served in the Pacific, screening aircraft carriers and providing shore bombardment at Okinawa. She was decommissioned on 17 February 1947 after less than three years of service and was scrapped.
Commissioned on 17 September 1944, Guam served in the Pacific with Alaska on many of the same operations. Along with Alaska, she was decommissioned on 17 February 1947 and was scrapped.
Hawaii was intended as a third ship of the class, was never completed. Numerous plans to utilize her in the years after the war came to nothing and she was scrapped.
Planned as the fourth ship of the class, to be built at Camden, NJ, but cancelled before being laid down.
Planned as the fifth ship of the class, to be built at Camden, NJ, but cancelled before being laid down.
Planned as the sixth ship of the class, to be built at Camden, NJ, but cancelled before being laid down.
See also
Commissioned on 17 September 1944, Guam served in the Pacific with Alaska on many of the same operations. Along with Alaska, she was decommissioned on 17 February 1947 and was scrapped.
Hawaii was intended as a third ship of the class, was never completed. Numerous plans to utilize her in the years after the war came to nothing and she was scrapped.
Planned as the fourth ship of the class, to be built at Camden, NJ, but cancelled before being laid down.
Planned as the fifth ship of the class, to be built at Camden, NJ, but cancelled before being laid down.
Planned as the sixth ship of the class, to be built at Camden, NJ, but cancelled before being laid down.
See also
Planned as the fourth ship of the class, to be built at Camden, NJ, but cancelled before being laid down.
Planned as the fifth ship of the class, to be built at Camden, NJ, but cancelled before being laid down.
Planned as the sixth ship of the class, to be built at Camden, NJ, but cancelled before being laid down.
See also
Planned as the sixth ship of the class, to be built at Camden, NJ, but cancelled before being laid down.
See also
| Alaska-class large cruiser |
| Alaska | Guam | Hawaii | Philippines | Puerto Rico | Samoa |
| List of cruisers of the United States Navy |
External links
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