So yeah, I think a percent boost in reputation would be good. The percent could increase when the fleet increases. I do think there should be a cap on a number of ships that can be in a fleet otherwise every ship on the sea could be involved.
I don't think a ship should receive a reward if...
Hey, I'm not sure how possible this is but I think it would be really cool if a fleet mechanic was implemented. It would function just like a crew but instead of pirates, it would be ships working together. You could click on a players ship name and send a fleet invite. You could receive bonuses...
I was solo sailing and tried to board a flagship. The game crashed in the process. When I logged back in my ship was sunk and I can not repair it.
Update: After I restarted the game again many many times it finally worked.