no - i think it's the door bell. how else will he know he has a visitor on the back porch?My first thought was, "Hey, Hotrod has the same porch light that I do," but you could be right. A ship's bell makes a lot more sense. And if we've learned anything, it's Hotrod is a sensible guy. Ding, ding ding, here comes the shit boat. I can hear it now.
I'm not real familiar with all the weird sound protocols used by ships, except for the five blast get-the-fuck-out-of-the-way-you-asshat one, but is there a sound signal for "My POS plywood claptrap is breaking up?"