Handy Tricks Six

Step 16 Lobster Buoy Hatches and Bilge Plugs.

Buoys for lobster and crab traps and many net floats are made of chewy closed cell foam. In the Marshall Islands people would cut bilge plugs from them. They also make a good hatch cover if you cut a hole the right size. Here's one in my dinghy's forward flotation compartment. The retaining rope passes through the float and is tied to a wooden cookie.