View our collection of diy sailboat plans that feature boat design for sailboats of all types! we have sail boat plans for yachts, day sailers, and more.. Sailboat designs and plans for an offshore capable cruising boat with shallow draft. the program of this boat is offshore cruising with comfortable accommodations for. 25′ (7.62m) or 27′ (8.23m) dive boat or just fun boat. beam 10′. draught (hull only) 1’5" for construction in either plywood or steel, or as a mould for grp.