All of the Indian Ocean north of 23°S, with the exception of that part east of 95°E and south of 7°N.

Ships which sank enemy submarines or were employed as escorts to convoys in the area during the period 8 December 1941 to 15 August 1945:

HMA Ships Bathurst, Burnie, Cairns, Cessnock, Gawler, Geraldton, Hobart, Ipswich, Launceston, Lismore, Manoora, Maryborough, Napier, Nepal, Nestor, Nizam, Norman, Quiberon, Quickmatch, Tamworth, Toowoomba, Vampire, Wollongong.