Boat speak terms we use to describe our designs. this glossary was originally published in our webletters. if you have any suggestions for additions, or corrections. Dixi dinghy. 8ft plywood stitch & glue 3:1 dinghy great "own boat" for kids. sails 1 adult or 2 kids, rows 3 adults length 2.44m [8’0"] beam 1.28m [4’2"]. Marine plywood standards figuring out marine plywood grades in order to choose materials for stitch and glue and other methods of boatbuilding can be confusing..