So fairly low, overall, on the power scale, right? Personally, the big appeal in One Piece beyond exploring is the improving your crew's strength imo. 

Also I had two more questions regarding the crew: For one, are we to write as if we are already part of a crew? Or will we all be captured individuals who form a crew out of the situation at the start? And secondly, will your character be our captain? I've always found it difficult to have a captain that's not the GM, but of course I understand if you're purely story-telling.