With captaincy, you now see who "The captain" of each ship is.
Which gets me thinking: it'd be fun if you could capture a crew's captain and put them in jail.
I don't think this needs complicated mechanics—just provide an incentive for crews to do this. Give them gold and a trinket for handing in another crew's captain, and then if they have a ship at their mercy, they might decide to accept surrender instead of sinking. Then the defeated crew's captain could decide to turn themselves in, instead of having their ship sunk and treasure stolen.
Once a captain turns themselves in, the other crew can teleport that captain to a jail cell at the nearest Sea Fort to receive their money / trinket.
This adds a new potential gameplay / roleplay scenario for the remaining crew that survived—a stealth PvE jailbreak scenario to get their captain out.
