Baidarka offsets free boat plans for building a strip-built baidarka style sea kayak 19′ long by 17 1/8" wide. note that the darker blue horizontal line represents the datum waterline. this where the boat will float at a 215 pound total displacement and as such the jaws would tend to catch a lot of weeds.. Use the free plans. some of those older plans use a table of offsets. a table of offsets is a table with rows and columns that shows the locations of points through which you will draw lines representing the hull of the boat. you must mark points, draw lines full size on the floor and correct some inaccuracies resulting from…. Stitch and glue plans are good wooden boat plans for beginners. making a model will pay back later and save you time when you build because you will have figured out how the boat goes together. your model will also help you decide if you like the look of the boat before you spend a lot of time and.