I'm pretty sure that (extremely effective!!) design should be credited to Jay Babina, though I can't seem to find a link at the moment. I modified my Coho hatches using his concept; they look great, are simple to use, and are about as watertight as one could want!

Glenn

Another hatch closure option is shown on some pictures at this link. I think
: the design came from Ross Leidy. If I'm wrong my apologies to the true
: inventor.