Alex McGruer wrote:

Oh the NDK hatches are truly water and air tight.

While watertight is obviously good, airtight is not, for the same reasons that you don't want to purge dry bags
excessively. Airtight hatches create pressure differentials which can draw water into the boat. Every boat I've
owned has stayed drier inside after I put small (1/32") breather holes in the bulkheads to allow pressure in the
compartments to equalize.

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Regards

Brian