We think the same, but ships have lots of paperwork, whereas a large civilian sailboat wouldn’t even be noticed.
Out for a family’s week vacation.
It would have to be a large sailboat.
It would need a decent winch and preferably a small crane.
I’m thinking a trawler, or ideally, perhaps, an oilfield support vessel, with directional thrusters.
Lots of paperwork through shell companies and etc., sure, why not.