UNITED STATES NAVY (UNITED STATES OF AMERICA)

Ship project history: These ships were built under 1909 program. At designing both variants with 12- and with 14`` main artillery were considered. The first of them has been chosen: only in this variant hull dimensions the ship presumed docking both on Atlantic, and on Pacific coasts. More powerful 305/50mm guns were specially developed. Part of secondary 127/51mm guns was positioned in a casemate amidships, remaining at ship ends. Armour protection was traditional for the first dreadnoughts: a narrow 280mm belt between barbettes of end main gun turrets amidships, tapering at ship ends to 127mm. Over it shorter second 229mm belt was placed. For the first time in the USN these ships received underwater protection.

Ship protection: Main 122m belt had 2.44m height (1.3m over and 1.14m under waterline) abreast citadel was 280mm thick at upper part tapering to 229mm at lower edge. Belt was connected with end barbettes by 280mm fore and 229mm aft bulkheads. There was narrow 127mm belt between barbette No6 and stern. There was 2.21m in height upper belt, 280mm at lower and 229mm at upper edges, it was closed by 229mm bulkheads. Casemate had 165mm armour and connected with barbettes No2 and 3 by diagonal 165mm bulkheads. Funnel uptakes had 165mm protection. Flat armoured deck connected with upper edge of main belt and was 57mm over boilers and 76mm over magazines. Main deck over turbines (between No4 and 5 barbettes) was unprotected. This deck had 38mm thickness from citadel to stem. It was 51mm aft from citadel and was strengthened over steering gear up to 76mm with 76mm slopes. Battery deck was connected with upper edge of upper belt and was 25mm between No2 and 6 barbettes, increasing to 44mm under casemate. Main gun turrets had 305mm faces, 203mm sides and rears and 76mm crowns. Barbettes were 254mm at upper and 102mm at lower edges. CT had 76mm roof. Underwater protection was 7.4m deep. There was 38mm longitudinal bulkhead.

Ship protection after modernization: Main 122m belt had 2.44m height (1.3m over and 1.14m under waterline) abreast citadel was 280mm thick at upper part tapering to 229mm at lower edge. Belt was connected with end barbettes by 280mm fore and 229mm aft bulkheads. There was narrow 127mm belt between barbette No6 and stern. There was 2.21m in height upper belt, 280mm at lower and 229mm at upper edges, it was closed by 229mm bulkheads. Casemate had 165mm armour and connected with barbettes No2 and 3 by diagonal 165mm bulkheads. Funnel uptakes had 165mm protection. Old flat armoured deck (now splinter deck) connected with upper edge of main belt and was 57mm over boilers and 76mm over magazines. Main deck over turbines (between No4 and 5 barbettes was unarmoured). This deck had 38mm thickness from citadel to stem. It was 51mm aft from citadel and was strengthened over steering gear up to 76mm and had 76mm slopes. New main deck (old battery deck) was connected with upper edge of upper belt and was 114mm over magazines, 120mm over boilers and 132mm over turbines. Main gun turrets had 305mm faces, 203mm sides and rears and 120mm crowns. Barbettes were 254mm at upper and 102mm at lower edges. CT had 120mm roof. Underwater protection was 9.0m deep. There was 38mm longitudinal bulkhead.

1931, Wyoming: was converted to TS. Armoured belt, turrets No4, 5 and 6 and part of boilers were removed. Her armament in 1944 consisted of 4 x 2 - 127/38 Mk 12 guns, 2 x 1 - 127/38 Mk 12 guns, 4 x 1 - 127/25 Mk 10 guns, 4 x 1 - 76/50 Mk 17/20/21 guns, 1 x 4 - 40/56 Bofors, 4 x 2 - 40/56 Bofors, 2 x 1 - 40/56 Bofors and (8 - 15) - 20/70 Oerlikon.

7/1942, Arkansas: maximal 305mm guns elevation angle was increased to 30°. - 10 x 1 - 127/51; + 2 x 1 - 76/50 Mk 10/17/18/20/21, 4 x 4 - 28/75 Mk 1, 20 x 1 - 20/70 Oerlikon, SC, SG, SK, FC (Mk 3) radars

9/1942, Arkansas: + 2 x 4 - 28/75 Mk 1

12/1942, Arkansas: + 2 x 4 - 28/75 Mk 1, 6 x 1 - 20/70 Oerlikon

5/1943, Arkansas: - 8 x 4 - 28/75; + 8 x 4 - 40/56 Bofors

5/1944, Arkansas: - 4 x 1 - 20/70; + 2 x 4 - 20/70 Oerlikon

11/1944, Arkansas: + 2 x 1 - 76/50 Mk 10/17/18/20/21, 1 x 4 - 40/56 Bofors, 6 x 1 - 20/70 Oerlikon, SG (2nd), 2 x Mk 19 radars

Naval service: Wyoming in 1931 was partially disarmed (according to London Naval Conference) and further used as a gunnery TS. Arkansas was foundered next day after nuclear-weapon tests at Bikini 25/7/1946.