Complete plans include full size patterns for the rudder, rudder sections, long beam, sawn chine & upright, bulwark knee, and half-section patterns for each of the. Lake buggy airboats provide airboat plans for mini airboats so you do not need to know how to design an airboat because we show you how to build an airboat. Picked up a garmin echomap 74dv for the airboat at west marine. discontinued unit. $399 on line or in store. https://www.westmarine.com/buy/garmin–echomap-74dv.