Sorry if my reply came across as being objective purely for the sake of being objective. When I understand the intent of a suggestion I try to expand on it and encourage the possibility of bouncing ideas back and forth.
So, this time only re-reading your posts in this thread, I see that you aren't suggesting "keeping" the acquired vessel, despite it being in your OP.
@loopct said
Really, a ship would be worth keeping and selling versus sinking if at all possible. Since players loose their ship anyways, there should be a feature to commandeer another ship by force, and sell it back at an outpost.
Providing that, as your second post states, that you could not use the second vessel to expand your crew, then I see no harm in it. This could add to a new "villainous" rep which would have been more suited to becoming a "pirate legend" than chasing pigs and chickens.
Would there be a time limit in selling the ship? If so, how long would it take before being considered as keeping the ship outright?
Would this second ship break apart after a certain time like in the red sea?
Returning to an outpost with the same ship you started with after whatever is considered a lengthy game session could be an idea for a commendation.
The more battles your ship endured could give higher praise although that might be further cause to PvP every newby in sight which will drive away a large portion of the current playerbase.
It's like walking a tight-rope and balancing the pros and cons. We can't just think about the feather in our left hand when we have a brick in our right hand. lol :o)