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45
46
47
48 -
49
50
5 1
52
53
54
55
56
FIELD
PURPOSE: To report resolution advisories (RAs) generated by
ACAS equipment. The coding of this register shall conform to:
1) Annex 10, Volume IV, 4.3.8.4.2.2.
BDS code 3,O
2) Bit 27 shall mean RA terminated when set to 1.
--
ACTIVE RESOLUTION ADVISORIES
RACs RECORD
RA TERMINATED
MULTIPLE THREAT ENCOUNTER
THREAT-TYPE INDICATOR
THREAT IDENTITY DATA
-. .-
Annex 10 - Aerorzautical Tekcommunications
Table 2-64 BDS 4,0 - Selected Vertical Intention
MB FIELD
I 11 STATUS
MSB = 32 768 fl
MCPIFCU SELECTED ALTITUDE
il Range = 0 to 65 520 ft (Resolution)
1 LSB = 16 ft (Resolution) STATUS ,
MSB = 32 768 ft
FMS SELECTED
ALTITUDE
/ ;; /I Range = 0 to 65 520 tt
-- --
ALT HOLD MODE
APPROACH MODE
38
39
40
4 1
42
43
44
45
46
- - .- ..- . -- - .
RESERVED
BAROMETRIC
LSB = 0.1 mb (Resolution) PRESSURE SETTING
MINUS 800 mb
RESERVED
TARGET ALTITUDE SOURCE
TARGET ALTITUDE SOURCE
- --
PURPOSE: To provide ready access to information about the
pilot's current vertical intentions, in order to improve the
effectiveness of conflict probes and to provide additional tactical
information to controllers.
1) Target altitude shall be the short-term intent value, at which the
aircraft will level off (or has levelled off) at the end of the current
manoeuvre. The data source that the aircraft is currently using
to determine the target altitude shall be indicated in the altitude
source bits (54 to 56) as detailed below.
Note.- This information which represents the real
"aircraft intent", when available, represented by the altitude
control panel selected altitude, the flight management
system selected altitude, or the current aircraft altitude
according to the aircraft's mode of flight (the intent may not
be available at ali when the pilot is flying the aircraft).
2) The data entered into bits 1 to 13 shall be derived from the
mode control panellflight control unit or equivalent equipment.
Alerting devices may be used to provide data if it is
not available from "control" equipment. The associated
mode bits for this field (48 to 51) Shall be as detailed below.
3) The data entered into bits 14 to 26 shall be derived from the
flight management system or equivalent equipment
managing the vertical profile of the aircraft.
4) The current barometric pressure setting shall be calculated from
the value contained in the field (bits 28 to 39) plus 800 mb.
When the barometric pressure setting is less than 800 mb or
greater than 1 209.5 mb, the status bit for this field (bit 27)
shall be set to indicate invalid data.
5) Bits 48 to 56 shall indicate the status of ;he values provided
in bits 1 to 26 as follows:
Bit 48 shall indicate whether the mode bits (49, 50 and 51)
are actively being populated:
0 = No mode information provided
1 3 Mode information deliberately provided
Bits 49, 50 and 51 :
0 = Not active
1 = Active
Bit 54 shall indicate whether the target altitude source bits
(55 and 56) are actively being populated.
0 = No source information provided
1 = Source informat~on deliberately provided
Bits 55 and 56, shall indicate target altitude source:
00 = Unknown
01 = Aircraft altitude
10 = FCUIMCP selected altitude
11 = FMS selected altitude
2811 1/02
Na. 77
Part I iltztzex 10 - Arrc~aazrtical Telecontmur~icatiorzs
Tables 2-65 to 2-67. BDS codes 4,l to 4,3 - Next waypoint details
PURPOSE: To provide ready access to details about the next waypoint on an aircraft's route, withoi~th e need to esiablish a data
link d~aloguew ith the fiight management system. This will assist with short- and medium-term tactical control. Register 6DS code 4,1
contains 9 characters in the compressed 6-bit character form glvrng the waypoint name.
-
1
2
3
4
5
6
7
-8
9
10
11
12
13
14
15
-16
17
18
19
20
2 1
22
23
-24
25
26
27
28
29
30
31
32 -
33
34
35
36
37
38
39
40 -
41
42
43
44
45
46
47
48 -
49
50
5 1
52
53
54
55
-56
50 1) RESERVED
' 1
2
3
4
5
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