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In modern tanks, the turret is armoured for crew protection and rotates a full 360 degrees carrying a single large-calibre tank gun, typically in the range of 105 and 125 mm (4.1 and 4.9 in) calibre. Machine guns may be mounted inside the turret, which on modern tanks is often on a "coaxial" mount, parallel with the larger main gun.
Since her decommissioning, the Battleship Iowa Museum in San Pedro hosts an annual memorial ceremony for the deceased crewmen of Turret 2. On 19 April 2019 the Veteran's Association of the USS Iowa officiated a ceremony in San Pedro marking the 30th anniversary of the incident; a similar event was held the same day at Iowa Point in Norfolk.
The 16-inch/50 caliber Mark 7 guns of the forward turret of the battleship USS Wisconsin (BB-64) fire at enemy targets ashore on the Korean Peninsula on 30 January 1952 during the Korean War. Employees working with the automatic 16-inch powder stacking machine at Naval Ammunition Depot Hingham , Mass. during World War II.
HMS Prince Albert, a pioneering turret ship, built by naval engineer Cowper Phipps Coles.. Before the development of large-calibre, long-range guns in the mid-19th century, the classic ship of the line design used rows of port-mounted guns on each side of the ship, often mounted in casemates.
A secondary Mark 40 fire-control director was installed inside the armored conning tower at the front of the superstructure that used the Mark 27 fire-control radar positioned on the top of the conning tower. Each turret is fitted with a rangefinder 46 feet (14 m) long and can act as a director for the other turrets.
The turret extended either four decks (Turrets 1 and 3) or five decks (Turret 2) down. The lower spaces contained the equipment required to rotate the turret and to elevate the guns attached to each turret. At the bottom of the turret were rooms which were used for handling the projectiles and storing the powder bags used to fire them.
The main gun turrets were relatively lightly protected in comparison to contemporary battleships. [24] Extensive levels of flash protection were employed. Maximum turret and barbette armour was reduced to 12.75 inches in this class from the 16 inches of the Nelson class. The turret faces had 12.75 in (324 mm) of armour at the front; 8.84 inches ...
The German battleship Bismarck, carried a main battery of eight 15 inch (380mm) guns, along with a secondary battery of twelve 5.9 inch (150mm) guns for defense against destroyers and torpedo boats, and an anti-aircraft battery of various guns ranging in caliber from 4.1 inch (105mm) to 20mm guns.