 RAN 3 was a Controlled Mining and Guard Loop Station at Cowan Cowan, and RAN 4 was the Indicator Loop and Harbour Defence ASDIC (anti-submarine detection sonar) Station at Woorim (Bribie Island Second World War Fortifications), on Bribie Island (extant).RAN 5 was the Combined Training Centre (Naval Wing), at Toorbul; RAN 6 was an Advanced Fairmile Base (AFMB) at Bongaree, Bribie Island; and RAN 7 was an Indicator Loop and Harbour Defence ASDIC Station at Bulwer on Moreton Island (extant).On the Brisbane River, RAN 8 was the Boom Defence Facility, an anti-submarine boom across the Brisbane River between Lytton and Bulwer Island (not extant); RAN 9 was the Indicator Loop and Photo-electric Beam Station, Myrtletown (extant); and RAN 10 was a Naval Store at Pinkenba (status unknown).