"Special service ship" . . . "decoy-ship" . "Q-boats" . . "decoy" . "Q boats" . . . "Q-ship" . "HMS ''Prunella''" . . . "decoy ship" . "Q ship" . . . . "Q-ships" . . "decoy ships" . "Special Service Ship" . . "Q ships" . . . . . . . . . . . "Special Service ship" . . . . "Q Launch" . "mystery ship" . . "Q-ship" . "'Q' ship" . "special service vessel" . "HMS ''Edgehill''" . . . . "mystery ships" . "decoy trawler" . . . "Q-Ship" . .