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The class leader, USS Alaska.
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 × 40 mm, 34 × 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 (58.2 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 include six vessels, although only two were completed. All were to be named after United States insular areas.^[1]

Contents 1 Description 2 History 3 Ships in class 3.1 USS Alaska 3.2 USS Guam 3.3 USS Hawaii 3.4 USS Philippines 3.5 USS Puerto Rico 3.6 USS Samoa 4 See also 5 External links 6 Notes

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 I and World War II by the terms of the Washington Naval Treaty and successor treaties and conferences. 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 effectively lapsed in 1939, 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-inch shells, and machinery capable of speeds up to 33 knots (61 km/h).

They resembled contemporary battleships in appearance and displacement, 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 six: four at the superstructure corners, and one each at 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 (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.

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.

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, New Jersey, but cancelled before being laid down.

Planned as the fifth ship of the class, to be built at Camden, New Jersey, but cancelled before being laid down.

Planned as the sixth ship of the class, to be built at Camden, New Jersey, but cancelled before being laid down.

• List of World War II ships
• Pocket battleship

v • d • e Alaska-class large cruiser
Alaska | Guam | Hawaii | Philippines | Puerto Rico | Samoa
List of cruisers of the United States Navy

• The Genesis of the Alaska Class Large Cruisers: Part One
• Photographs of the Alaska class