Telephonics Corporation
R ADAR SYSTEMS D IVISION
TM113806 (3/10) 1-15
Table 1.3.5-1
Navigation ARINC 429 Data Labels (Cont)
LABEL DEFINITION UNITS RESOLUTION
TX RATE
(HZ)
NAVIGATION
OVERLAY
TRACKER
MODE
NOTES
150 Time Hr-Min-Sec 1 Sec 1 Yes Yes Label 150 is the primary Time label and Label 125 is a
secondary source for time.
If not present then GMT will not be displayed in
Navigation Overlay mode.
Required for proper Tracker operation. If not present
then the tracker will be non-operational and “AMS Data
Fail” will be displayed.
Not required for Target Marker operation.
204 Baro Altitude Ft 1 Ft 2 No Yes Not required for Navigation Overlay mode or Target
Marker operation.
Required for Tracker operation. This is a secondary
source for Baro Altitude. Primary source is from the Air
Data System.
Required for proper Tracker operation. If not present
then the tracker will set the altitude of 5000 feet. Minor
errors in range (typically less than 0.5 nm) will occur
when the aircraft deviates away from 5000 feet.
210 True Air
Speed
Kt 0.0625 1 Yes No If not present then the True Air Speed will not be
displayed in Navigation Overlay mode.
Not required for Tracker Operation or Target Marker
mode.
251 Distance to
Go
NM 0.125 NM 2 Yes No If not present then the Distance To Go will not be
displayed in Navigation Overlay mode.
Not required for Tracker Operation or Target Marker
mode.
252 Time to Go Min 1 Min 2 Yes No If not present then the Time To Go will not be displayed
in Navigation Overlay mode.
Not required for Tracker Operation or Target Marker
mode.
The document reference is online, please check the correspondence between the online documentation and the printed version.
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