Installing & Removing G-chart CartridgesThe GARMIN GPSMAP 230 system uses G-chart offshore or inland cartographyto display digital charts on-screen. G-chart cartridges are installed in the card slotlocated at the bottom right of the GPSMAP unit. G-chart cartridges maybe installed or removed at any time, whether the unit is on or off.To install a G-chart cartridge:1. Open the cartridge door on the GPSMAP 230 unit.2. Insert the card (label facing front and G-chart logo at top) into the slot.3. Use your thumb to firmly push the cartridge into place. If your GPSMAP 230 is on, a con-firmation tone will sound when the cartridge has been properly installed and accepted.4. Close the door (Note: The door will not close unless the G-chart is fully inserted.).If you insert a G-chart cartridge and get a ‘card format not recognized’ message, tryremoving the card and reinserting it. If the card is still not recognized, contact thedealer you purchased it from for assistance. G-chart cartridges are not waterproof,should not be exposed to moisture or excessive static charges, and should be storedin the anti-static bag supplied with the cartridge.To remove a G-chart cartridge:1. Open the cartridge door.2. Grasp the card at the bottom groove and pull firmly.3. If your GPSMAP is on, a confirmation tone will sound when the G-chartcartridge has been removed.65SECTION10G-CHARTSInstalling &Removing G-chartsF