Telephonics Corporation
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A D A R
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Y S T E M S
D
I V I S I O N
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.
