'QO' was a British naval mineclearing operation in British coastal waters (October 1942).

Undertaken by the 9^th Minesweeping Flotilla (Bangor, Blackpool, Bridlington, Bridport, Peterhead, Sidmouth, Tenby and Rhyl), the operation was designed to clear a passage through the British East Coast Barrier for the safe passage of destroyers entering or departing Harwich.