Fine Woodworking magazine has published various plans over the years for building some of your own shop tools. If you are interested in boatbuilding, you probably are interested in tools. If you are building a boat, you wish you had more tools than you do. Some of these are right down the alley for me.
A bandsaw, crosscut saw, thickness sander, etc. are all available as downloadable PDF’s for the cost of a subscription (or sign up for the free 15 day trial I guess).