190-01182-02
GTR 225/GNC 255 TSO Installation Manual
Rev. F
Page B-18
B.2.4.2.7 Decoded OBS setting
This message outputs the current OBS setting, which may be read from the NAV’s internal resolver, the
last valid value received over serial, or from user input to the front panel.
Message format:
“V” ..........................Message class. This is a GNC NAV message.
“22”.........................Message identifier.
v ..............................Valid flag. “0” (zero) = OBS invalid/not present, “V” = OBS setting is valid.
ddd ..........................Three digit OBS setting, in degrees. Values are in the range of “000” to “359.”
Example message:
$PGRMV22V170<chksm><CR><LF>
A valid OBS setting of 170 degrees.
B.2.4.2.8 Radial From Active VOR
This message outputs the current bearing from the active VOR station.
Message format:
“V” ..........................Message class. This is a GNC NAV message.
“23”.........................Message identifier.
v ..............................Valid flag. “0” = bearing not valid, “V” = bearing is valid.
dddf .........................Bearing to a resolution of 1/10th of a degree. ddd = three digit bearing in
degrees, ranging from “000” to “359.” f = 1/10th of a degree.
Example message:
$PGRMV23V1654<chksm><CR><LF>
A valid bearing of 165.4 degrees FROM the active VOR station.
