Where is the measurable curvature of oceans? Earth is 70% water, flat water.
There is no measurable curvature anywhere on Earth, so if you think you've found it, please let us know. There are millions of us that would love to see water breaking it's own law of physics and bending thousands of miles around a spheroid.

If you honestly think you can just "hop on a ship and take off" for Antarctica without Government approval, then you know nothing about the Antarctic Treaty, and you're just publicly proving that you've done zero research into this subject.

You've given us nothing worthwhile to think about, you've just offered the same tired logical fallacies we've all heard over and over again.