 Using the goniometre consisting of switches and controls of the direction and height finding components, the operator would monitor the screen and make comparisons to decipher the direction, elevation and distance of the aircraft.In essence the ACO was totally unsuited to the fluid nature of war in the Pacific and was not used in the region, except in Australia, although intended for Singapore and Malaya.However, in a fixed situation it had some advantages over the more portable British COL (Chain Overseas Low Flying) and Australian LW/AW mostly in use, including better penetration of thunderstorms and better height- finding ability.