INTRODUCTIONThank you for choosing the Garmin® GPSMAP ® 276C, whichutilizes the proven performance of Garmin GPS and full-featuredmapping to create an unsurpassed portable marine navigationchartplotter and automobile navigation device. Take a moment tocompare the contents of this package with the packing list on theoutside of the box; if any pieces are missing, contact your Garmindealer immediately.About This ManualTo get the most out of your new navigation system, take time to readthis manual and learn the operating procedures for your unit. Thismanual is organized into the following sections:The Introduction contains the Table of Contents. The GettingStarted section provides an overview of the unit, how to turn theunit on, and how to simulate navigation.The Basic Operation in Marine Mode section provides you withinformation about navigating with the GPSMAP 276C in MarineMode. The Marine Mode Pages and Features section reviews themain pages and features in Marine Mode, such as using DSC andMan OverBoard.The Basic Operation in Automotive Mode section provides youwith information about navigating with the GPSMAP 276C inAutomotive Mode. The Automotive Mode Pages and Featuressection reviews, in detail, the main pages and features in AutomotiveMode, such as the Trip Data Page and creating waypoints.The Main Menu section describes features found on the MainMenu, and information on how to change settings.If you have a Garmin Sounder Module connected to yourGPSMAP 276C, refer to the Setting Up and Using Sonar section.The Appendix contains specifications, optional accessories,maintenance information, and other product information.An Index is provided at the end of the manual for reference.Manual ConventionsThis manual uses the term Warning to indicate a potentiallyhazardous situation, which, if not avoided, could result in death orserious injury.This manual uses the term Caution to indicate a potentiallyhazardous situation, which, if not avoided, may result in minorinjury or property damage. It may also be used without the symbolto alert you to avoid unsafe practices.GPSMAP 276C Owner’s Manual iINTRODUCTION > ABOUT THIS MANUAL