In article lutions,
"Capt. JG" wrote:

So, you weren't on your boat. You carry the shotgun and the sidearm on your
boat, but do you travel to foreign ports? I doubt it. If so, please let us
know which ones.

Carrying a Firearm, aboard a Vessel in International Trade is no "Big
Deal" if you follow the International Conventions, and Treaties, put in
place by the IMO. (International Maritime Organization - part of the
United Nations) Specifically, you must have a "Customs Locker" that
meets IMO Requirements, you MUST Declare any Firearms, to the Customs
Officials, upon entering any Foreign Port, and comply with the IMO
Conventions for such situations. Is it a "Hassle", Yes, and, No, and
Maybe. Some folks do it, some folks don't. US Flagged, and US Military
Ships, routinely travel to many Ports of Call, in many different
Countries, and they don't seem to have much of a problem, complying with
the IMO Conventions. Of course what country would want a 5" Autoloader
Pointing at their Customs Shed, ready to reduce it to rubble.......