In 1909 the US Navy decided to build two battleships that would form the Wyoming class, they were the USS Arkansas and USS Wyoming. It was decided to equip the two ships with twelve 305/50mm guns in 6 twin turrets. Although they might seem little powerful for a ship of that time, these guns offered good performances and above all, allowed to build them immediately. The Wyoming class was the culmination of dreadnought ships armed with 12in guns, and were the first US Navy battleships to use a torpedo bulkhead that greatly improved antisubmarine protection. The two vessels were sent to reinforce the Royal Navy in British waters after USA entered in WWI, and in the mid-1920s both ships were modernized. Horizontal protection and protection against torpedo damage was improved and the AA artillery was reinforced. The USS Wyoming was transformed into a training ship in 1931 according to the London Naval Treaty. In 1939, during WWII, the USS Arkansas served as a reserve ship for Neutrality Patrols established on the American Atlantic coast. From 1941 to 1944 she served as a gunnery training ship until it was sent to bombing Omaha Beach during D-day to later support the Allied invasion of the South of France. In 1945 it was transferred to the Pacific where she participated in the landings of Iwo Jima and Okinawa. The Wyoming was scrapped in August 1947 and the Arkansas served as a target ship for the nuclear tests and was sunk in 1946.

WYOMING class gallery and more info


Información adicional

Ficha Completa
Country of origin

United States


New York Shipbuilding, Camden



Entered service



Originally: 1,063 – Rebuilt: 1,650

Displacement, (full load)

Originally: 27,700 tonnes – Rebuilt: 31,000 tonnes

Dimensions (length x beam x draught)

Originally: 171.30 x 28.40 x 8.70 meters
Rebuilt: 171.30 x 32.30 x 9.70 meters

Armour, (maximum)

Steel: Barbettes: 279mm – Main turrets: 305mm – Command tower: 305mm
Steel: Belt: 279mm – Bulkhead: 38mm (rebuilt) – Upper deck: 76mm – Armoured deck: 76mm


Originally; 12 x Babcock & Wilcox boilers – 4 x Parsons steam geared turbines
Rebuilt: 4 oil-fired boilers – 4 x Parsons steam geared turbines

Power, (total)

28,000 shp

Shafts - Screws

4 shafts – 4 screws


20.5 knots (38 km/h)


Originally: 2,700 tonnes of coal + 400 tonnes of oil
Rebuilt: 5,100 tonnes of fuel oil


8,000 n. miles (14,800 km) at 10 knots


3 seaplanes

Main guns

12 x 305/50mm Mk.7 guns in twin turrets

Secondary guns

Originally; 21 x 127/51mm guns in single mounts – Rebuilt; 6 x 127/51mm guns in single mounts

AA guns

Rebuilt; 10 x 76mm guns + 9 x 40mm quad mounts + 26 x 20mm guns


Originally: 2 x 533mm torpedo tubes (submerged)


2 ships: Arkansas – Wyoming