All boatbuilders need a block plane in their toolbox. They are used for cutting scarfs, trimming off a bit of wood here and there, and shaping all manner of parts. We couldn't imagine building a boat, even from a kit, without a sharp block plane. Though you could buy a block plane for less, this Stanley low-angle block plane will last for generations.

This is the "Stanley Bailey" model, a pattern that dates back to the 1860's. With reasonable care, this plane will still be at work a hundred years from now.

The 13-1/2° blade angle is a champion for bevels in marine plywood, or shaping any kind of marine-grade timber. If you have just one plane in your toolbox, it should be this one.