There doesn't seem to be a round earth consensus among the sailing community. If I joined and voted, it would be tied with a few maybes...
Are the voters visible? It's possible a few voters might be swayed by a sort of "Shy Tory effect" or "Bradley effect" might be in play.
Well I got to say a stand corrected. I just have not ran into anyone claiming a FE around marinas. I did not make an account for that site and can not read the post, but by the comments here it seems at least one person was not convinced the Earth is round.
I have bellied up to the bar with merchant marines, commercial fishermen, various ex-members or current members of different countries navies.
Of course except for one time rather recently I never discussed the shape of the Earth. The closest is normally navigation, like landmarks, distances I should see them and bearings when talking about fishing spots or good anchorages.
It has got me curious. I rather suspect sports fishermen and recreational boaters would be most likely believe the Earth is flat. Maybe sailors not responsible for navigation or doing things like estimating range might be more likely to believe in a FE.
When I get some time I will pick several sites with what would likely have different demographics covering ex-navy, commercial fishermen, people who blue water cruise and recreational.