Wood on a boat is subject to a lot of dimensional changes in size as humidity and temperatures change the moisture content of the wood. Wooden doors are going to swell and shrink as the air in the boat becomes moist or dry.
The doors in our table (where we store our linens) are rather large, so a small percentage in dimensional change will equate to some significant movement in the wood.
These doors used to close easily, but after a rather most winter, the wood swelled slightly, but caused the doors edge to migrate a few millimeters. Now the doors overlap instead of closing. The solution will be to trim the wood at an angle to allow the latches to meet and the doors to close.
Using a block plane, I was able to slowly and carefully bevel the edge of the door to allow the edge to pass the latch and the doors to close effortlessly.
With the wood trimmed off and the doors closing easily, the fresh wood was then given a few coats of varnish to seal it up and protect it from future moisture. Varnish doesn't make wood waterproof, but it does help. Varnished wood is sealed up and fed well with the oils and resins in the varnish. This creates a barrier to keep the moisture out, or at least slow the ingress of moisture.
With some simple hand tools, the problem of a non closing door can be fixed and cruising life can continue on without a hitch!