You're going to have to figure it out for yourself I'm afraid, as there's no magical universal setting. Looking around online, or some folks here, might be able to give you some basic ideas, but it'll be damn near impossible to tell you exactly what to do. Just bring a laptop, or lots of memory cards, and you'll get it figured out
All I can say, with my wildly limited experience, is that if your boat is moving - forward, up and down, side to side, whatever, you aren't going to be able to do any sort of prolonged exposure.