Installation manual

Environmental Qualifications
62 Apollo MX20 Installation Manual
Table 11 - Moving Map ASCII Navigation Data
ID Data Format Length Description
s = sign: E for east, W for west
ddd = degrees x 10
T ---A----- 9 Warnings: The 4th character will be an “A” when
the navigation data is flagged, otherwise, all
characters will be dashed. All other navigation data
will be dashed when it is flagged.
6.2 BINARY NEAREST LIST DATA (WHEN EXTENDED DATA IS
ENABLED ONLY)
The nearest waypoints lists are sent one waypoint per data transmission set. The lists are sent in
the following order:
• LFAC
• VOR
• NDB
• INT
• User
There is a maximum of twenty waypoints per type. The waypoints are a maximum of 600 nm
from the current position. The waypoints are order by distance from current position nearest to
farthest. The maximum time to send all lists is 100 second. Each list is updated just prior to the
first waypoint in the list being sent. If a list is empty a shorter record will be sent with the List Item
Number set to 0xFF.
Table 12 - Nearest Waypoint List Data
Byte Format Description
1 Z
‘Z’ Item Designator
2 sddddddd
List Item Number: Packed, unsigned binary values
s = 1 End of list, 0 all other
ddddddd = 1 – 20 list waypoint index
sddddddd = 0xFF List Type is EMPTY (BYTE 4 terminate Item)
3 t
Waypoint Type:
t = {a (airport) || v (VOR) || n (NDB) || i (INT) || u (USER)}
4
Cr
‘\r’ Item Terminator <0x0d> (ONLY IF BYTE 3 = OxFF)
4-8 ddddd
ASCII Waypoint Identifier
9
10
11
sddddddd
xxmmmmmm
xhhhhhhh
Latitude of waypoint. Packed, unsigned binary values for degrees, minutes
and hundredths of minutes.
s = 0 North latitude, 1 South latitude
x = undefined
ddddddd = Latitude degrees
mmmmmm = Latitude minutes
hhhhhhh = Latitude hundredths of minutes
12
13
14
15
sxxxxxxx
dddddddd
xxmmmmmm
xhhhhhhh
Longitude of waypoint. Packed, unsigned binary values for degrees, minutes
and hundredths of minutes.
s = 0 East longitude, 1 West longitude