I always thought it would be killer to have one on the boat. can you hear it really good with the hatch down?I put a train horn on my boat under the hatch. I had WIred for Sound install it, but you can buy a combo on Ebay for a great price (250-300) these days which includes everything you need. Less if you don't want the train horn. I must say, it is probably the best thing I hot for the boat, but when you've had a couple you have to remember to stay away from that button. It also comes in really handy when the jetski's cut in front of you
I do believe that coast gaurd regs. state that all vessels must be equipped with a horn... your just doing your part to stay legal.handYou can hear it pretty good with the hatch down, but nothing like when the hatch is up. It does tick a lot of people off though. I am truly waiting for the day I get boarded and the sherriff asks about a horn.