Leica TPS1200 series Technical Reference Manual page 1367

Examples
NMEA Message Formats
Field Description
N = Data not valid
<CR> Carriage Return
<LF> Line Feed
Standard Talker ID
$GNRMC,113616.00,A,4724.5248557,N,00937.1063064,E,0.01,11.43,100406,11.43,E,D*
1C
User defined Talker ID = GN
$GNRMC,113806.00,A,4724.5248547,N,00937.1063032,E,0.00,287.73,100406,287.73,E,
D*10
TPS1200 1367