The Women's Auxiliary Australian Air Force members of 3FS were billeted at St Anne's Girls School, Townsville.
The role of 3FS was to co-ordinate all of the intelligence information from the various D/F stations and VAOC posts, decide on the most appropriate response and then advise the appropriate fighter or bomber squadrons to respond.
The main operations building was made of 30-centimetre (12 in) thick reinforced concrete designed to withstand a direct bomb hit.
3 Fighter Sector Headquarters comprised 32 rooms in the large rectangular concrete building with caneite partitions forming various passageways.
Modern day use of the site has apparently been hindered by the presence of old tunnels that were in use during World War II.
In 1961 it was purchased by James Cook University of Queensland and was used as a temporary accommodation for students while the residential halls at douglas were being built.