Ditto Mike and Smart Dog.
Sporting guns that were short are not seen as often as longer pieces from this time period, but are not rare and were made for covert shooting.
A gentleman's military career in general did not interfere with his sporting shooting, and sport-shooting was a real passion amongst many. (Guns used very hard)
I see this gun has been made for the late owner, and decorated accordingly, but in no way at all do I see it as being used aboard a ship, ...unless for shooting seagulls as a way of passing the time!
Sporting guns of this period are Very often decorated with a stand of arms. V common and no military connection.
It Does look a Lovely example, and I too would like to see more details!!
Congrats, Al, Very fine piece.
Richard.