<P> The United Kingdom's South Australia Act 1834 described the waters forming the southern limit of the new colony of South Australia as "the Southern Ocean". The Colony of Victoria's Legislative Council Act of 1881 delimited part of the division of Bairnsdale as "along the New South Wales boundary to the Southern ocean". </P> <P> In the 1928 first edition of Limits of Oceans and Seas, the Southern Ocean was delineated by land - based limits: Antarctica to the south, and South America, Africa, Australia, and Broughton Island, New Zealand to the north . </P> <P> The detailed land - limits used were from Cape Horn in South America eastwards to Cape Agulhas in Africa, then further eastwards to the southern coast of mainland Australia to Cape Leeuwin, Western Australia . From Cape Leeuwin, the limit then followed eastwards along the coast of mainland Australia to Cape Otway, Victoria, then southwards across Bass Strait to Cape Wickham, King Island, along the west coast of King Island, then the remainder of the way south across Bass Strait to Cape Grim, Tasmania . The limit then followed the west coast of Tasmania southwards to the South East Cape and then went eastwards to Broughton Island, New Zealand, before returning to Cape Horn . </P> <P> The northern limits of the Southern Ocean were moved southwards in the IHO's 1937 second edition of the Limits of Oceans and Seas . From this edition, much of the ocean's northern limit ceased to abut land masses . </P>

Why did they change the name of the antarctic ocean