There were 17 buildings at Project 81 as follows:- • 1 Guard Room • 2 Old dilapidated weather board cottage, Airmens Quarters • 3 Prefabricated Hut G.I. Roof - Met Store Room • 4 Latrine • 5 G.I. Shed • 6 Weather board Building G.I. Roof General Offices • 7 Canteen • 8 W.A.A.F. Mess Room • 9 Airman's Mess Room • 10 Guard House • 11 Latrines • 12 Air Conditioning Plant • 13 Area Operations Room and General Offices • 14 Photographic Intelligence Section • 15 G.I. Shed • 16 Weather Board Building G.I. Room • 17 25 Yard Range Mound It is believed that the bunker was used as
No. 24 Squadron RAAF Headquarters and by the RAAF Operations and Signals group (Intelligence). The building (120 ft x 60 ft) was built like a fortress, with enormous thick walls and roof. It was apparently capable of sustaining a direct hit with minimal damage. The rooms in the bunkers were used as follows:- • Emergency Power Plant • Intelligence Officer • Meteorological Officer • Meteorological Room • Navigation Officer • Crew Room • Operations Room • Cypher Room • Signals Office • Receiving Room • Signals Officer • Men's Lavatory • Telephone Exchange • Strong Room Two other rooms separated by a walkway were:- • Fan Room • Condenser Room == Construction ==