Garmin GPS 155XL Installation Manual page 28

The following is a list of labels output by the GPS 155XL/GNC 300XL:
*These labels are formatted per the General Aviation Manufacturers Association (GAMA) definition.
Note that the use of a 429-device w/o GAMA will cause the loss of the above asterisked labels. Some may
be required for A1 certification. For example, label 326 changes the CDI scale for approach.
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Revision F
Navigation/Position Data:
Label (octal)
100 Selected course
114 Desired track
115 Bearing to waypoint
116 Cross track error
121 Horizontal command (to autopilot)
251 Distance to go
252 Time to go
310 Present position latitude
311 Present position longitude
312 Ground speed
313 Ground track
314 True heading
320 Magnetic heading
147* Magnetic variation
261* GPS navigation mode
275* Navigation status
326* Lateral scale factor
351* Distance to destination
352* Time to destination
Flight Plan Data:
Label (octal)
074*
075*
113*
300* Station magnetic variation/type/class
303*
304* Waypoint identifier characters 1-3
305* Waypoint identifier characters 4-6
306*
307*
Identification Data:
Label (octal)
377
371* General Aviation equipment identifier
Description
Description
Flight plan header
Active from/to waypoints
Message checksum
Message length/type/number
Waypoint latitude
Waypoint longitude
Description
Equipment identifier
GPS 155XL/GNC300 XL Installation Manual
190-00067-22