Since Antarctica has no government, the visa requirements you may have only depend on your route, and the path you take to your Antarctic destination.
Your visa requirements in order to visit Antarctica are based on the requirements of the countries through which you travel to access the continent. Antarctica has no sovereignty, and thus, no requirement for travel papers.
Your answer depends on your citizenship and the passport and/or visa requirements established for the countries you must travel through to reach your ultimate Antarctic destination.
The citizenship documentation required to visit Antarctica is dictated by your route to the continent. If you pass through no country on your journey, no visa is required per se to travel to Antarctica.
The visa is not necessary.
No.
This visa is not necessary.
In my opinion, yes.
Yes, Visa for Qatar is necessary.
The visa is not necessary for Australians citizens.
The visa for Germany is not necessary.
Visa for Romania is not necessary to citizens from Malaysia; see the link below.
Not necessary