[dhx]

Some more information for anyone interested:

The latest IHO standard S-23 is edition 3 from 1953 [1] and identifies the waters around Antarctica as either the South Pacific Ocean, Indian Ocean or South Atlantic Ocean. Boundaries between the three oceans in the vicinity of Antarctica are approximately [2] the lines south of Cape Agulhas (southern point of the African continent), South East Cape (southern point of Tasmania, Australia) and Cape Horn (southern point of the South American continent).

In addition to the political disputes of more modern times about names and geographic limits, there have historically been problems with determining the real geographic location referred to in historical maps, and problems with naming of points in maps. The first point of the Australian mainland which the Captain James Cook expedition attempted to name as "Point Hicks" was found by later navigators to be over 20km offshore from the mainland in the middle of the ocean[3]. The government in 1970 in celebration of the bicentenary of the Captain James Cook expedition to Australia decided to rename "Cape Everard" to "Point Hicks".

[1] https://iho.int/uploads/user/pubs/standards/s-23/S-23_Ed3_19...

[2] The standard notes that Argentina and Chile were in dispute regarding the southwest limit of the South Atlantic Ocean and eastern limit of the South Pacific Ocean.

[3] https://www.anps.org.au/upload/Sept_2013.pdf