Okay, just for the record I'm not American, and it's not flag-waving to honour the individuals who gave their lives, or risked them, in combat -- no matter the flag they sailed under. My point was that the boats in SH4 carry the names of real WW2 US submarines, and I didn't want anyone to think I was not aware of that by asking my question.
And I'm aware that it's bad luck to rename a boat!

I used to teach blue-water keelboat sailing many moons ago, and skippered more than my share of charters, and have a great appreciation for nautical tradition.

But then, it used to be bad luck to have a woman aboard ship, and to be honest I'd buck that one as well for a cute blonde XO in tropical dress anyday.
Thanks for the pointers to the files!