Мини-турнир "Caribbean Sea"

And also, how will the winner be determined in case of a tie in points and days?

Well, I would suggest not inventing anything new and determining it based on mercury.

Added 1 minute ago

We do NOT use navigation bonuses on land - does this mean we always have to take off the admiral's hat at night??? Or disassemble it??? Or only if you disembark on the next day on land? Or should we take it off completely when disembarking on land????...

I don't think it's worth overthinking it. The main thing is not to deliberately make a disembark-embark-disembark maneuver to accumulate movement points... :) All other processes (disembarking on islands to complete tasks and then re-embarking in the boat) are simply inevitable here, so let everything run its course.