 RAN Station 9 never detected any Japanese intruders, although submarines had been sighted east of Stradbroke Island (March 1942) and off Moreton Island (June 1942), and on 14 May 1943 the hospital ship Centaur was struck by a torpedo and sunk off the Brisbane coastline.The last attack to occur in the approaches to the Port of Brisbane took place on 4 June 1943 off Cape Moreton, when a Japanese submarine fired on the American ship MV Edward Chambers.The indicator loop in the Brisbane River was removed in June 1945.