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Technical Provisions for Mode S Services and Extended Squitter

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A-64 <strong>Technical</strong> <strong>Provisions</strong> <strong>for</strong> <strong>Mode</strong> S <strong>Services</strong> <strong>and</strong> <strong>Extended</strong> <strong>Squitter</strong><br />

MB FIELD<br />

DRAFT - Working Paper ASP TSGWP11-01 <strong>for</strong> review by the TSG during the meeting in June 2011 in Paris<br />

1<br />

2<br />

MSB<br />

3<br />

4<br />

5<br />

AIRCRAFT TYPE<br />

6 LSB<br />

7 MSB<br />

8 NUMBER OF ENGINES<br />

9 LSB<br />

10<br />

11<br />

MSB<br />

12<br />

13<br />

14<br />

ENGINE TYPE<br />

15 LSB<br />

16<br />

17<br />

MSB<br />

18<br />

19<br />

20<br />

CHARACTER 1<br />

21 LSB<br />

22<br />

23<br />

MSB<br />

24<br />

25<br />

26<br />

CHARACTER 2<br />

27 LSB<br />

28<br />

29<br />

MSB<br />

30 CHARACTER 3<br />

MODEL<br />

31<br />

32<br />

DESIGNATION<br />

33 LSB<br />

34<br />

35<br />

MSB<br />

36<br />

37<br />

38<br />

CHARACTER 4<br />

39 LSB<br />

40<br />

41<br />

MSB<br />

42<br />

43<br />

44<br />

CHARACTER 5<br />

45 LSB<br />

46<br />

47<br />

MSB<br />

48<br />

WAKE TURBULENCE<br />

49<br />

50<br />

CATEGORY<br />

51<br />

52<br />

53<br />

LSB<br />

54<br />

55<br />

56<br />

RESERVED<br />

Table A-2-37. BDS code 2,5 — Aircraft type<br />

PURPOSE: To provide in<strong>for</strong>mation on aircraft type.<br />

1) Subfield coding<br />

The coding shall be as in Doc 8643 — Aircraft Type Designators. All<br />

the subfields that contain characters shall be encoded using the 6-bit<br />

subset of IA-5 as specified in Table 3-9 of Annex 10, Volume IV.<br />

2) <strong>Mode</strong>l designation<br />

Coding shall consist of four characters as specified in Doc 8643. The<br />

fifth character shall be reserved <strong>for</strong> future expansion <strong>and</strong> shall contain<br />

all ZEROs until it is specified. 2222 in the first four characters shall<br />

mean that the designator is not specified.<br />

3) Number of engines<br />

This subfield shall be encoded as a binary number where number 7<br />

means 7 or more engines.<br />

Draft<br />

DRAFT - Working Paper ASP TSGWP11-01 <strong>for</strong> review by the TSG during the meeting in June 2011 in Paris

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