I don't think this bay is named after a person named Umberto Tupini (I guess that is this Umberto Tupini: en.wikipedia.org/wiki/Umberto_Tupini).
Instead I think it can be named Bollevika Bay.
http://upload.wikimedia.org/wikipedia/commons/3/38/Bouvet_Island_topographic_map-en.svg
If someone ever read this note, I wish to have help in resolving this issue.