Boat plans for power, sail and small boats. free boat plans. kits and supplies plus the best boat building technical support..  altair industries driftboat plans altair offers complete plans and a construction guide for a 16′ mckenzie river drift boat. (added: 2-dec-2003 hits: 44761) my. This boat is easy to build using our downloadable boat plans. our boat plans are available for instant download so you can start building right away..