longitude in degrees and minutes, with options for degrees,minutes and second, degrees only, or one of several gridformats.Map datum is a math model which depicts a part of the surfaceof the earth. Latitude and longitude lines on a paper map arereferenced to a specific map datum.1 Find out which map datum and position format was usedwhen the original waypoint was created.If the original waypoint was taken from a map, there shouldbe a legend on the map that lists the map datum and positionformat used to create that map. Most often this is found nearthe map key.2 On the chartplotter, select Settings > Units.3 Select the correct map datum and position format settings.4 Create the waypoint again.NMEA 0183 InformationType Sentence DescriptionTransmit GPAPB APB: Heading or track controller(autopilot) sentence "B"GPBOD BOD: Bearing (origin todestination)GPBWC BWC: Bearing and distance towaypointGPGGA GGA: Global positioning systemfix dataGPGLL GLL: Geographic position(latitude and longitude)GPGSA GSA: GNSS DOP and activesatellitesGPGSV GSV: GNSS satellites in viewGPRMB RMB: Recommended minimumnavigation informationGPRMC RMC: Recommended minimumspecific GNSS dataGPRTE RTE: RoutesGPVTG VTG: Course over ground andground speedGPWPL WPL: Waypoint locationGPXTE XTE: Cross track errorPGRME E: Estimated errorPGRMM M: Map datumPGRMZ Z: AltitudeSDDBT DBT: Depth below transducerSDDPT DPT: DepthSDMTW MTW: Water temperatureSDVHW VHW: Water speed and headingReceive DPT DepthDBT Depth below transducerMTW Water temperatureVHW Water speed and headingWPL Waypoint locationDSC Digital selective callinginformationDSE Expanded digital selective callingHDG Heading, deviation, and variationHDM Heading, magneticMWD Wind direction and speedMDA Meteorological compositeMWV Wind speed and angleType Sentence DescriptionVDM AIS VHF data-link messageYou can purchase complete information about National MarineElectronics Association (NMEA) format and sentences from: NMEA,Seven Riggs Avenue, Severna Park, MD 21146 USA (www.nmea.org)Software License AgreementBY USING THE DEVICE, YOU AGREE TO BE BOUND BY THETERMS AND CONDITIONS OF THE FOLLOWING SOFTWARELICENSE AGREEMENT. PLEASE READ THIS AGREEMENTCAREFULLY.Garmin Ltd. and its subsidiaries (“Garmin”) grant you a limitedlicense to use the software embedded in this device (the“Software”) in binary executable form in the normal operation ofthe product. Title, ownership rights, and intellectual propertyrights in and to the Software remain in Garmin and/or its third-party providers.You acknowledge that the Software is the property of Garminand/or its third-party providers and is protected under the UnitedStates of America copyright laws and international copyrighttreaties. You further acknowledge that the structure,organization, and code of the Software, for which source code isnot provided, are valuable trade secrets of Garmin and/or itsthird-party providers and that the Software in source code formremains a valuable trade secret of Garmin and/or its third-partyproviders. You agree not to decompile, disassemble, modify,reverse assemble, reverse engineer, or reduce to humanreadable form the Software or any part thereof or create anyderivative works based on the Software. You agree not to exportor re-export the Software to any country in violation of the exportcontrol laws of the United States of America or the export controllaws of any other applicable country.22 Appendix