Last night I was watching a movie
on the boat when I started hearing a hissing sound. It was like air leaking out of a punctured tire. I thought oh S#$&T I have a leak. I started pulling up the bilge
covers and the noise
got louder. I pulled every bilge
cover and they were all bone dry except the one by the prop shaft which always has a little water
in it. I checked all the through hulls and valves nothing leaking. The hissing lasted about 5 minutes then stopped. I have only two aerosol cans on the boat and they were fine. Both fire extinguishers were fully charged. Propane
tank was turned off. Checked all the bilges again this morning all bone dry. Any ideas?