I suppose an experiment might be to launch a balloon far far in the south like New Zealand as far down as you can go and try to make observations with a telescope from the highest clear vantage point (some miles high). That's how you'll get the best perspective and acuity that our eyes can see and have best resolution for the telescope looking over nothing but ocean. But if you can do this, then have a big boat and conduct the experiment even further south, but I'd wager it might get hustled by the powers that should not be.