RAN Station 9, Pinkenba, Military defense site in Pinkenba, Australia

RAN Station 9 is a World War II indicator loop and photo-electric beam monitoring complex in Myrtletown Reserve, at the end of Gannon Road near Pinkenba. Its concrete control and generator hut stands at the southeast corner of the reserve, beside concrete slabs from the quarters and mess building. The site lies on the northern bank of Boggy Creek where it joins the Brisbane River.

RAN Station 9 was built in the 1940s as an indicator loop and photo-electric beam monitoring station on the north bank of Boggy Creek where it meets the Brisbane River. It was one of ten RAN stations protecting Moreton Bay, and was meant to detect Japanese submarines or surface vessels heading up the river. The site was added to the Queensland Heritage Register on 17 July 2008.

The station's name survives in local use as "RAN Station 9, Myrtletown", after the reserve on Boggy Creek where it stands. Its indicator loop worked on a simple principle: a magnet moving over a stationary wire loop induced a current, and a submarine's residual magnetism was enough to register. If no surface ship could be seen, a vessel was sent to drop depth charges.

The station stands in Myrtletown Reserve at the end of Gannon Road, near Pinkenba, on the north bank of Boggy Creek where it meets the Brisbane River. Access is by road to the reserve; the concrete control and generator hut sit at the southeast corner, with concrete slabs from the quarters and mess building nearby. The surrounding Myrtletown area is an industrial zone with large undeveloped blocks and few houses.

The station's indicator loop worked on induction: a submarine's residual magnetism, even after degaussing, generated a current in a stationary wire loop, and if no surface vessel was visible a patrol could be sent to drop depth charges. The loop technology was developed by the British Royal Navy at HMS Osprey from 1915.