Garmin GNC 420A Installation Manual page 117

C.4 OUTPUT SENTENCE TYPE 2
The 400 Series Type 2 output sentence shall have the following general format:
id - item designator (3 ASCII characters)
seq - sequence number (1 binary byte)
wpt - waypoint identifier (5 ASCII characters)
lat - waypoint latitude (3 binary bytes)
lon - waypoint longitude (4 binary bytes)
mvar - magnetic variation at waypoint (2 binary bytes)
CR - ASCII carriage return character (0D hex)
LF - ASCII line feed character (0A hex)
Each waypoint in the route being navigated by the 400 Series unit shall have a Type 2 sentence output by
the 400 Series unit approximately once every second.
If no route is being navigated by the 400 Series unit (i.e., the active route is empty), the following Type 2
sentence is output approximately once every second:
id - item designator (3 ASCII characters; route sequence number is "01")
seq - sequence number (1 binary byte; last waypoint flag is set; route sequence number is 1)
CR - ASCII carriage return character (0D hex)
LF - ASCII line feed character (0A hex)
400 SERIES INSTALLATION MANUAL
P/N 190-00140-02
Page C-3
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