GS 385 was in service by August 1943. Partially manned by Volunteer Defence Corps (VDC) soldiers from this time, Brisbane's gun stations were redesignated as Troops (Static), with their parent batteries under the command of Headquarters, Brisbane AA Group. By late 1943, 6 HAA Battery (Static) controlled the three 3.7 inch gun stations south of the Brisbane River: at Balmoral (387 Troop); Hemmant (390 Troop); and Lytton (385 Troop). North of the Brisbane River, 38 HAA Battery (Static) controlled the three 3.7 inch gun stations at: Victoria Park (386 Troop); Hendra (389 Troop); and Pinkenba (388 Troop). An artillery "troop" is a sub-unit of a battery. 385 Troop at Lytton was briefly under the command of 38 HAA Battery, August–October 1943. The gun station at Heath Park seems to have been replaced by the new gun station at Balmoral. The 3 inch gun stations at Amberley (391 Troop) and Archerfield (392 Troop), also controlled by 6 HAA Battery (Static), were disbanded in late 1943. The six active 3.7 inch gun stations now formed a rough oval with its centre south of Eagle Farm.
