Four quadruple 21 inch 533 mm torpedo tubes were fitted.Ĭomprehensive fire-control equipment was proposed, with two Low-Angle LA directors for the 6-inch guns for use against surface targets, together with four barrage directors for the 6-inch guns for barrage fire against aerial targets, with three combined HA/LA directors for the 4.5-inch guns for use against both surface and air targets. This was arranged with 7 twin Bofors and 4 twin Oerlikons around the bridge, 3 twin Bofors and 8 twin Oerlikons around the aft superstructure and 2 twin Oerlikons at the stern of the ship. Close-in anti-aircraft armament consisted of 20 Bofors 40 mm guns in 10 'Buster' self-contained twin mounts and 28 Oerlikon 20 mm cannon in 14 twin mounts. The guns were semi-automatic and fitted with a power loader, giving a maximum rate of fire of 24 rounds per minute per barrel, although when the gun entered service, the power rammer proved unreliable, with hand loading reducing rate of fire to about 10–12 rounds per minute per barrel. These could fire a 55 lb 25 kg shell to a range of 20.000 yards 18.288 m, with a maximum effective altitude for anti-aircraft fire of 19.700 feet 6.005 m. Secondary armament consisted of six QF Mark 6 4.5 in 113 mm dual purpose twin turrets as used in the Daring -class destroyer. The turrets were arranged conventionally on the ships centreline, with two forward and two aft. A 129.75 lb 59 kg armour-piecing shell could be fired to a range of 25.000 yards 22.860 m. The new turret, the Mark 25, mounted three QF 6 inch Mark V guns, capable of firing at a rate of 10–12 rounds per minute per gun compared with 6-8 for the Mark 24, and elevating to 80 degrees, giving an anti-aircraft capability.

The Mark 24, which was an improved version of the pre-war turret, was considered old fashioned however, and a new mounting was chosen accepting the delays in construction that would ensue. Consideration was given at first to using the existing Mark 24 mountings, as planned for the Tiger -class ships, as these could be delivered relatively quickly. The main gun armament was to be twelve 6-inch 152 mm guns in four triple turrets.

Neptune class star trek