Two sure-fire methods.
1. gun.2. big dog.3. tear-gas fixed to underside of hatch fitted with one-way fasteners that set it off if opened wrong, like James Bond's briefcase (idea I had for my Buick convertible's radio).But foget the burglar alarm. All those stupid 'woop-woop' things do is go off inadvertantly, annoy neighbours, and advertise that you think you have something worth stealing, since (round here anyway) no one ever pays them any mind at all. If I were a thief I'd set it off two or three times in one night, break in the fourth time, and then turn it off myself once inside the boat as though I were the owner. No one would suspect a thing and I could check out the ravioli and what have you as I liked. [wink]Sad to say, the only sure-fire way to stop thieves is to STOP them. Not to get political, but if you were a thief and knew you had a 50-50 chance of running into an owner with a gun on board you would definitely think twice before going there. Thieves are not concerned with the legality of you shooting to kill-- any suggestion of potential hassle will probably deter them. Also they are stupid. Make a fake alarm system (battery-powered blinking light and window decal) and make sure it's visible through the window. Ten to one he will hit the neighbour's boat instead. If they were interested in taking the hard or high road they'd get a job and pay for it, right?JC