318CONNECTIONS AND MAINTENANCE78 Connectionsq EXTERNAL SPEAKER LEADConnects to an external speaker.w GPS RECEIVER LEADConnects to a GPS receiver for position indication.• An NMEA0183 ver. 2.0 or 3.01 (sentence formatters RMC, GGA,GNS, GLL) compatible GPS receiver is required. Ask your dealerabout suitable GPS receivers.e DC POWER CONNECTORConnects the supplied DC power cable from this connectorto an external 13.8 V DC power source.CAUTION: After connecting the DC power cable, GPSreceiver lead and external speaker lead, cover the con-nector and leads with an adhesive tape as shownbelow, to prevent water seeping into the transceiver.r ANTENNA CONNECTORConnects a marine VHF antenna with a PL-259 connectorto the transceiver.CAUTION: Transmitting without an antenna may dam-age the transceiver.Rubber vulcanizingtapeYellow: NMEA IN (+)Green: NMEA IN ( )Blue: Speaker (+)Gray: Speaker ( )qw er