InterfacingThe following formats are supported for connection ofexternal devices.Garmin Proprietary Sentences—PGRME (estimatederror), PGRMM (datum string), PGRMZ (altitude).The NMEA 0183 version 3.01 interface format issupported by the GPSMAP 60Cx, and enables the unitto drive up to three NMEA devices.The following are the sentences for NMEA 0183,version 3.01 output:Approved sentences—GPGGA, GPGLL, GPGSA,GPGSV, GPRMB, GPRMC, GPRTE, GPVTG,GPWPL, GPBOD, GPAPBUse the USB Data Cable provided with the product or optional Power/Data Serial Port Cable with Auxiliary AC Power Adapter or Power/DataSerial Port Cable with Bare Wire Leads. Refer to the Garmin Web site:www.garmin.com/products/gpsmap60cx/Optional Power/Data Serial Port Cable with Bare Wire LeadsUnit Power/Data Port View(-) GroundData OutData In(+) PowerPower(+)Data InData OutGround(-)USB Port underWeather Cover Serial Port underWeather CoverThe Advanced NMEA SetupPage, accessed from theInterface Setup Page OptionsMenu allows you to enable ordisable NMEA sentences, setwaypoint ID’s and the precisionof Lat/Lon minutes.GPSMAP 60Cx Owner’s Manual APPendIx > InterfAcIng