Appendix

NMEA Operation

This radio supports NMEA0183 version 3.01.

NMEA Input

The radio supports RMC, GLL, GNS, GGA and ZDA sentences. When these sentences are received, the radio displays latitude/longitude, date, time, course, and speed. If any sentence except an RMC or GLL sentence is received, the radio uses the information based on the following priority order.

Status:RMC > GLL > GNS > GGA Latitude/Longitude:RMC > GLL > GNS > GGA UTC Time :RMC > GLL > GNS > GGA > ZDA Date:RMC > ZDA

Speed / Course:RMC Notes:

If the radio received only a GLL sentence, the radio does not display the current speed, course, and date.

If the radio received RMC and GLL sentences, the radio uses only the RMC sentence.

Status data is used to check which GPS data is valid or invalid.

NMEA Output

When the radio receives a DSC Call (Distress, Position Reply, Position Send), it outputs a DSC/DSE sentence from the NMEA output port.

Note: When the radio receives a Distress call, it outputs a sentence in the following format. $CDDSC,12,3081234000,,07,00,0354013946,0657,,,S,E*6D $CDDSE,1,1,A,3081234000,00,60875646*13

Appendix

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Uniden UM-525 manual Appendix, Nmea Operation, Nmea Input, Nmea Output