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12,660 metres (13,850 yd) [2] The BL 4-inch Mk IX naval gun [ note 1 ] was a British medium-velocity naval gun introduced in 1917 as secondary armament on the Renown -class battlecruisers and Glorious -class "large light cruisers", but which served most notably as the main armament on Flower-class corvettes throughout World War II .
Following the war, the US stock of 9.2-inch weapons was moved to the US and placed in reserve; a total of 45 guns. In April 1919, 40 of them were placed at coast defence installations for gun loading training. In 1923, these guns, plus the five others and 45,000 shells, were withdrawn to war reserve storage. In 1926 the 9.2 was listed for disposal.
Many reticle illumination and pattern options are available. Common light sources used in firearm reflector sights include battery powered lights, fiber optic light collectors, and even tritium capsules. Some sights are specifically designed to be visible when viewed through night vision devices. The color of a sight reticle is often red or ...
The 9.2-inch Mk XI gun introduced in 1908 increased the bore length to 50 calibres in an attempt to increase the velocity still further, but proved unsuccessful in service and was phased out by 1920. The Mk X was hence the final Mark of 9.2-inch guns in widespread British Commonwealth service. The BL 9.2 also affected the development of radar.
BL 9.2 inch gun Mk IX–X (1899), a British 9.2 inch coastal defence cannon; Armstrong Whitworth 12-inch 40-calibre naval gun Mark IX (1901), a British naval gun that was later used on land in the BL 12 inch Railway Gun; 21in Mk IX torpedo, a British 21-inch torpedo; Bliss-Leavitt Mark 9 torpedo (1915), an American 21-inch torpedo
The Bliss-Leavitt Mark 9 torpedo was a Bliss-Leavitt torpedo developed and produced by the E. W. Bliss Company and the Naval Torpedo Station in Newport, Rhode Island in 1915. The Mark 9 was originally intended to be used on battleships. Before the Mark 9 could be issued, however, use of torpedoes on battleships was discontinued and Mark 9 ...
A new breech-loading gun with a 9.2-inch (234 mm) bore, firing a 380-pound projectile was calculated to be suitable. [4] A total of 19 Mk I and Mk II guns of 26 calibres were made starting in 1881, but after lengthy delays and modifications they proved unsatisfactory and none made it to sea.
The Mk.10 seat is a development of the Mk.9. Like the Mk.9 it features only one firing handle (the face blind handle being deleted), use of the explosive gas system was extended to operate the drogue gun and harness release system. Arm restraint lines and command ejection capability were new additions. For ease of maintenance the Mk.10 was ...