 The ships' complement consisted of 190 officers and ratings, although the flotilla leaders carried an extra 20 officers and men for the Captain (D) and his staff.The primary armament of the Tribal-class destroyers was eight quick-firing (QF) 4.7-inch (120 mm) Mark XII guns in four twin-gun mounts, designated 'A', 'B', 'X', and 'Y' from front to rear.For anti-aircraft (AA) defence, they carried a single quadruple mount for the QF two-pounder Mk II "pom-pom" AA gun and two quadruple mounts for the 0.5-inch (12.7 mm) Mark III machine gun.