Uniden UM-525 - Manual (Page 50)

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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