Allow me to introduce myself. I am Hexachlorophene J. Goodfortune, Kidnapper-At-Large, and Devourer of Tortoises par Excellence, at your service.
If you can read this, then this sentence is false.
Note that the Man-o-War cannot be bought nor
sold. It can only be obtained by a hostile takeover and
must be abandoned when acquiring a new ship!
Also, common sense. You're not part of your nation's navy. Why would your ship change when your nation as at war?