Sentence DescriptionPGRMZ Z: AltitudeSDDBT DBT: Depth below transducerSDDPT DPT: DepthSDMTW MTW: Water temperatureSDVHW VHW: Water speed and headingReceiveSentence DescriptionDPT DepthDBT Depth below transducerMTW Water temperatureVHW Water speed and headingWPL Waypoint locationDSC Digital selective calling informationDSE Expanded digital selective callingHDG Heading, deviation, and variationHDM Heading, magneticMWD Wind direction and speedMDA Meteorological compositeMWV Wind speed and angleVDM 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)Registering Your DeviceNOTE: If your device has Wi‑Fi technology, you should use theActiveCaptain app to register the device (Getting Started withthe ActiveCaptain App, page 4).Help us better support you by completing our online registrationtoday. Keep the original sales receipt, or a photocopy, in a safeplace.1 Insert a memory card into the card slot on the chartplotter.2 Wait a few moments.The chartplotter opens the card management page andcreates a file named GarminDevice.xml in the Garmin folderon the memory card.3 Remove the memory card.4 Insert the memory card into your computer.5 On your computer, go to garmin.com/express.6 Follow the on-screen instructions to download, install, andopen the Garmin Express application.7 Select > Add a Device.8 While the application searches, select Sign In next to Havemarine charts or devices? near the bottom of the screen.9 Create or sign in to your Garmin account.10Follow the on-screen instructions to set up your vessel.11Select > Add.The Garmin Express application searches the memory cardfor the device information.12Select Add Device to register the device.When registration is complete, the Garmin Expressapplication searches for additional charts and chart updatesfor your device.When you add devices to the chartplotter network, repeat thesesteps to register the new devices.Software UpdateNOTE: If your device has Wi‑Fi technology, you should use theActiveCaptain app to update the device software (UpdatingSoftware with the ActiveCaptain App, page 4).You may need to update the device software when you installthe device or add an accessory to the device.This device supports up to a 32 GB memory card, formatted toFAT32.Before you update the software, you can check to the softwareversion installed on your device (Viewing System SoftwareInformation, page 35). Then, you can go to garmin.com/support/software/marine.html, select See All Devices in this Bundle, andcompare the installed software version to the software versionlisted for your product.If the software on your device is older than the one listed on thewebsite, follow the steps to load the software on a memory card(Loading the New Software on a Memory Card, page 41), andthen update the device software (Updating the Device Software,page 41).Loading the New Software on a Memory CardYou must copy the software update to a memory card using acomputer that is running Windows software.NOTE: You can contact Garmin customer support to order apreloaded software update card if you do not have a computerwith Windows software.1 Insert a memory card into the card slot on the computer.2 Go to garmin.com/support/software/marine.html.3 Select echoMAP Series with SD Card.4 Select Download next to echoMAP Series with SD Card.5 Read and agree to the terms.6 Select Download.7 Choose a location, and select Save.8 Double-click the downloaded file.A Garmin folder containing the software update is created inthe selected location. A dialog box opens to assist intransferring the software update to a memory card.9 Select Next.10Select the drive associated with the memory card, and selectNext > Finish.A Garmin folder containing the software update is created on thememory card. The software update can take several minutes toload onto the memory card.Updating the Device SoftwareBefore you can update the software, you must obtain asoftware-update memory card or load the latest software onto amemory card (Loading the New Software on a Memory Card,page 41).1 Turn on the chartplotter.2 After the home screen appears, insert the memory card intothe card slot.NOTE: In order for the software update instructions toappear, the device must be fully booted before the card isinserted.3 Follow the on-screen instructions.4 Wait several minutes while the software update processcompletes.5 When prompted, leave the memory card in place and restartthe chartplotter manually.6 Remove the memory card.NOTE: If the memory card is removed before the devicerestarts fully, the software update is not complete.Appendix 41