The most comprehensive, instructional, Garmin GPSmap 535, 535S Inland, 545, 545S Offshore, 525, 525S, 555, 555SD Bennett Marine training DVD will teach you all the features & functions & HOW TO USE your unit. This step-by-step training DVD walks you through the key features of the unit and gets you up and running in no time. Learn everything you need to know to begin using your new satellite navigator, from projecting waypoints to setting up routes.40 minutes $34.95-Deeply Discounted Here!