Four prototype QF 4-inch Mark XV High-Angle Control System anti-aircraft directors, one Mark II on the fore-top and a Mark I * mounted on a pedestal above the rear superstructure.
12.
During the 1929 31 refit, a High-Angle Control System ( HACS ) Mark I director was added on the rear searchlight platform and two positions for 2-pounder " pom-pom " anti-aircraft directors were added at the rear of the spotting top, although only one director was initially fitted.
13.
During this refit, her anti-aircraft armament was increased to twelve 5-inch guns, the foundation for a search radar was added atop her foremast, her anti-aircraft directors were upgraded and a platform for four water-cooled caliber M2 Browning machine guns was installed at the very top of the mainmast.
