In the picture, the hatch is hinged. On my particular boat there are no hinges. The cockpit locker lid simply rests on top of the gutter, and 2 bronze bolts overlapped by the cockpit bench stop the back of the locker lid from flipping up. The bronze bolts are parallel to the plane of the locker lid, lower than the bench, and stick out the back of the lid, so the seats can't flip up.
This is another decidedly annoying and non-seaworthy setup that I inherited.
For this reason I am considering something like these:
I am trying to get some reviews, as I see there are many manufacturers, and I want to know which ones are good and which are not so good. It must be robust, as it will be walked on quite a bit, and I hope that the inside opening is larger than 9"x22", just because I want to be able to crawl in and out, and jam the genoa in there, as well as ditty bags, etc.
Or should I simply rebuild the typical gutter-hatch? It would be nice for it to be flush.
One idea I had was to cut a hole in the new bench, install frames around the underside perimeter that the new hatch would rest on, gasket it, and let the water drain into a hose. This would be pretty simple, and hopefully leak free.
I thought that idea was cool because it didn't necessitate any fasteners that would be exposed to water. Ever.