The plotter can be mounted on any surface using the mount- ing bracket provided with the unit (see figure).Use 4 countersunk head screws (4mm) to fix the bracket tothe desired mounting surface. Since the bracket does not al- low any left or right rotation, make sure that the unit is prop- erly installed for the best view angle. Fixed mounting ? Installation and Precautions Marine depth sounder Marine autopilot : To connect the GEONAV to an autopilot, use theoptional NMEA data cable (see the : To connect the GEONAV to a depth sounder,use the optional NMEA data cable (see the Connections Connections Section).? Sec-tion). 10 The car lighter adapter has a little marine lamp (LED) that goes on if the car is cor- rectly providing power to the bracket. If the lamp is off: ?check that the 12V voltage is availablefrom the lighter plug;?open the adapter and check the fuse.If the fuse is broken, replace it with a fusehaving the same electrical characteristics. DO NOT USE ANY BYPASS CIRCUIT.The fuse ensures that the special protec-tion circuit inside the plotter works prop- erly in case of accidental short-circuit, po- larity inversion and overvoltage. The GEONAV can be powered by us- ing the appropriate power supply cable with car lighter plug or the built-in battery pack.Install the power supply cable withthe connector in the position shown in the figure, then exert a light pres- sure until clicking.To remove the cable, extract the ringnut without rotating it. When the cable is disconnected, make sure that the connector is protected by the appropriate rubber cap. External power supply Power supply Connections CONNECTIONS fuseLED EnglishEnglish 11