Leica GPS1200 Series Technical Reference Manual page 1361

Examples
NMEA Message Formats
The Mode indicator field supplements the Status field. The Status field is set to A for the
Mode indicators A and D. The Status field is set to V for the Mode indicator N.
Standard Talker ID
$GNGLL,4724.5248556,N,00937.1063059,E,113615.50,A,D*7B
User defined Talker ID = GN
$GNGLL,4724.5248541,N,00937.1063044,E,113805.50,A,D*7E
GPS1200 1361