Five of the plaques have since been recovered, but Rockingham Navy Club members have called for return of the rest or for anyone with information to come forward.
The plaques included memorials to the efforts and sacrifices of Australian naval personnel who served in the Korean and Vietnam wars, and three who lost their lives in peacetime while serving on Oberon-class submarines.
HMAS Torrens, Swan, Stuart, Melbourne, Brisbane and Sydney memorials of their services in Vietnam, and memorials to Korean War combatants 850, 817 and 805 Squadron, and HMAS Warramunga, Tobruk, Commonwealth and Condamine accounted for the bulk of plaques stolen.
A plaque commemorating the deaths of three Fleet Air Arm 805 Squadron crew – Lieutenant Keith Clarkson and Sub-Lieutenants Richard Sinclair and Ronald Coleman – and the deaths of HMAS Sydney crew Able Seaman Edgar Pearce and Ordinary Seaman Brian Payne during service from illness during the Korean War was among those removed.
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The last plaque commemorated submariners Christopher Passlow and Hugh Marcrow and Damien Humphries, who died while serving aboard HMAS Onslow and Otama respectively.
Anyone with information can contact Police on 9528 8000, Crime Stoppers on 1800 333 000 or Peter O’Donohue on 0438 119 161.