A pair of QF 6-pounder Hotchkiss AA guns on high-angle mountings were mounted on the quarterdeck in 1915. They had a maximum depression of 8° and a maximum elevation of 60°. The guns fired a shell at a muzzle velocity of at a rate of fire of 20 rounds per minute. They had a maximum ceiling of , but an effective range of only . They were replaced by a pair of QF 3-inch 20 cwt guns on high-angle Mark II mounts in 1916. These guns had a maximum depression of 10° and a maximum elevation of 90°. They fired a shell at a muzzle velocity of at a rate of 12–14 rounds per minute. They had a maximum effective ceiling of .