6 GPSMAP ® 2008/2108 Owner’s ManualgeTTing sTarTedNOTE: If using a new, blank SD card to transferwaypoints from MapSource, insert it in yourGPSMAP 2008/2108 unit before copying thefiles from your PC. This prepares the card.Understanding the Home ScreenUse he Home screen to access all other screens.• Charts—access Navigation (page 7).NOTE: On the GPSMAP 2008/2108 unit,you must insert a preprogrammed BlueChart®SD card to access the navigation and fishingcharts. GPsMAP 2008/2108 supports GarminblueChart ® g2 map. blueChart ® g2 is usedfor illustration in this owner’s manual.blueChart® g2 is only available in someexclusive regions currently, please checkwith your local Garmin distributors for moredetails.• sonar—access sonar information (page 31).NOTE: This option is available only if you havea unit with a built-in sounder or a Garmin sonarmodule connected.• Chart/sonar—set up the screen to view a chartand sonar in a split screen (page 13).• Where To?—access navigation features (page14).• Information—view information includingtides, currents, celestial data, user data, andinformation about other boats (page 21).• Configure—access unit and system settings(page 25).GPSMAP 2008/2108 provides compass indicator onthe main page to visually help users know the headingof the boat. The compass is shown up to the scale of2 degrees.The feature works only when GPS signal islocated.