Bungee hatch holder

A good way to hold a cockpit hatch lid open is with stout bungie cord, as shown here. The slight amount of stretch required to get the cord over, for example, a sheet cleat makes it very secure, much more so than using non-elastic line. Also, the elastic bungee will stretch enough to accomodate seat cushions. You can secure the bungee with short fat screws holding finish washers. Just pull a loop of bungee under the finish washer, tighten down the screw and trim the bungee - works great.