The 20th Minesweeping Flotilla was a
Royal Australian Navyminesweepingflotilla that operated during the
Second World War. Formed on 9 December 1939 and styled in the naming convention for minesweeping flotilla names used by the Royal Navy, the flotilla consisted of
HMAS Swan,
Yarra,
Doomba and
Orara. The makeup of the flotilla changed during the course of the war.