Telephonics Corporation
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I V I S I O N
1-14
TM113806 (3/10)
Table 1.3.5-1
Navigation ARINC 429 Data Labels
LABEL
DEFINITION
UNITS
RESOLUTION
TX RATE
(HZ)
NAVIGATION
OVERLAY
TRACKER
MODE
NOTES
074 Data
Record
Header
Number of
Records
-- Once
per
flight plan
See Note 1
Yes
No
Required for Waypoint Navigation Overlay – if not
present then no waypoints
Not required for Tracker operation or Target Marker
operation
075 Active
Waypoint
From / To
Data
From / To
Waypoint
No.
-- Once
per
flight plan
See Notes
1 and 2
Yes
No
Required for Waypoint Navigation Overlay – if not
present then no waypoints
Not required for Tracker operation or Target Marker
operation
114
Desired Track
Deg
0.044 Deg
2
Yes
No
If not present then desired track will not be displayed
Not required for Tracker operation or Target Marker
operation
116 Cross-Track
Distance
NM
0.0039 NM
10
No
No
Not Used by Navigation Overlay, Tracker, or Target
Marker operation
125
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.
Required for proper tracker operation. If not present
then tracker will be non-operational and “AMS Data
Fail” will be displayed.
Not required for Target Marker operation.
147 Magnetic
Variation
Deg
0.044 Deg
1
Yes
No
Required for Navigation Overlay. If not present then a
“NO NAV” fault will be displayed if navigation overlay
mode is selected.
Not required for Tracker operation.
If not present, then the Target Marker function will
output relative range and bearing only. The target
marker will not output lat, long, or true heading.
The document reference is online, please check the correspondence between the online documentation and the printed version.
