Inside Hatch Lock
Two suggestions LaDonna:1. Duplicate hasp on the outside and inside. I assume you have a hasp arrangement as placed by the manuacturer, but I would use a pin with a lanyard inside, so you make a fast emergency exit ie: no padlocks inside.2. A pole from the inside of the hatch lip to the bow end of the hatch opening ( similar to the bar you put in sliding patio doors)and again a fast method to release. The hatch would have to be placed over the duck boards. On my friend's Beneteau 405, he put a Radio Shack battery operated motion detector on the mast step. Unfortunately, the only intruder it detected was a great big, mooring line walking rat, which prompted his wife to ask for a return airplane ticket home. Proved the detector worked and she did calm down---eventually.Locally, we have a dangerous gang of intruders, they board your boat, attack your body , even genitals, and if you don't defend youself, they'd have no hesitation to leave you dead or dying-- of course I refer to our Provincial Bird--the Mosquito. (They love tourists, especially U.S.) Seriously, I hope my suggestions might help, now if I could solve my stern rail problem.........