the 10 pound pom scheme started in 1945.
when did the 10 pound pom scheme start?
1945
the "king george v"-class design had four 0.5-inch quadruple machine gun mounts but in 1939 these were replaced by two mark vi pom-poms. in 1940, to combat air attack, four unrotated projectile (rocket) mountings were fitted, one on "b" turret, two on "y" turret and one replacing a pom-pom mount added in 1939 at the stern. the pom-poms in "king george v" were designed and produced by vickers armstrongs, as a result of a post-world war i requirement for a multiple mounting which was effective against close-range bombers or torpedo planes. the first model, tested in 1927, was a very advanced weapon for its time and in 1938 the mark vi* had a muzzle velocity of 2,400 feet per second, a 1.594-inch bore and a barrel length of 40 calibres. the pom-poms fired 1.8-pound shells at a rate of 96–98 rounds per minute for controlled fire and 115 rounds per minute for automatic fire. the range of the mark vi* was 6,800 yards, at a muzzle velocity of 2,300 feet per second. the mark vi octuple mount weighed 16 tons and the mark vii quadruple mount weighed 10.8 tons if power operated; it could be elevated to 80 degrees and depressed to 10 degrees at a rate of 25 degrees per second, which was also the rate of train. the normal ammunition supply on board for the mark vi was 1,800 rounds per barrel. "king george v" introduced the mk iv pom-pom director to the royal navy in 1940, becoming the first ship in the world to feature gyroscopic target tracking in tachymetric anti-aircraft directors. the anti-aircraft battery of these ships was incrementally augmented throughout the war. the number and disposition of guns varying from ship to ship, "king george v" in september 1945 carrying: 8 mark vi octuple pom-poms, 2 quadruple 40 mm bofors mk ii (us), 2 single 40 mm bofors, and 24 single 20 mm oerlikon cannon.
king george v-class battleship (1939)
sigma 24mm f/1.8 ex dg lens





























the sigma 24mm f/1.8 ex dg is wide-angle lens which features a fast f/1.8 maximum aperture for use in low-light situations, and macro focusing capability to a reproduction ratio of 1:2.7. it uses aspherical lens elements. though intended for 35mm film and full-frame digital slrs, this lens is available for several makes of aps-c digital slr cameras, where the angle of view is similar to a moderate wide-angle lens (in the 35mm-40mm range, depending on the size of the d-slr sensor).
sigma 24mm f/1.8 ex dg lens