2 Insert the memory card 2 . There is no difference between the two card slots on the chartplotter. Any compatible card can be inserted into any open card slot, and it will be read by the chartplotter. 3 Press the card in until it clicks. 4 Clean and dry the weather cap. NOTICE To prevent corrosion, be sure the memory card and weather cap are thoroughly dry before closing the cap. 5 Press the weather cap firmly shut. Acquiring GPS Satellite Signals The device may need a clear view of the sky to acquire satellite signals. The time and date are set automatically based on the GPS position. 1 Turn on the device. 2 Wait while the device locates satellites.
It may take 30 to 60 seconds to acquire satellite signals. To view the GPS satellite signal strength, select > System > Satellite Positioning . If the device loses satellite signals, a flashing question mark appears over the boat position indicator ( ) on the chart. For more information about GPS, go to garmin.com/aboutGPS . For help acquiring satellite signals, see My device will not acquire GPS signals , page 215 . Selecting the GPS Source You can select your preferred source for GPS data, if you have more than one GPS source. 1 Select > System > Satellite Positioning > Source . 2 Select the source for GPS data. 18 GPSMAP® Owner's Manual Owner's Manual Introduction