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5.4 Mode S packet formats . . . . . . . . . . . . . . . . . . . 247
Tables for Chapter 5 . . . . . . . . . . . . . . . . . . . . . . . . 249
Figures for Chapter 5 . . . . . . . . . . . . . . . . . . . . . . . . 271
Chapter 6 . VHF Digital Link (VDL) ............. 279
Air-ground VHF digital link
communications system characteristics . . . . . . . . 279
System characteristics of the ground installation . . 279
System characteristics of the airborne
installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . 279
6.4 Technical provisions relating to international
air-ground data interchange . . . . . . . . . . . . . . . . 280
Chapter 7 . Subnetwork Interconnection ........... 282
(to be developed)
Chapter 8 . AFTN Network .................... 283
8.1 Definitions . . . . . . . . . . . . . . . . . . . . . . . . . . . . 283
8.2 Technical provisions relating to teletypewriter
apparatus and circuits used in the AlTN . . . . . . . 283
8.3 Terminal equipment associated with aeronautical
radioteletypewriter channels operating in the band
2.5-30MHz . . . . . . . . . . . . . . . . . . . . . . . . . 285
8.4 Characteristics of interregional AFS circuits .... 285
8.5 Technical provisions relating to ATS
message transmission . . . . . . . . . . . . . . . . . . . . 286
8.6 Technical provisions relating to international
ground-ground data interchange at medium and
higher signalling rates . . . . . . . . . . . . . . . . . . . . 286
ANNEX 10 .VOL UMR I11
Annex 10 .Aero nautical Telecommunications Volume I11
Chapter 9. Aircraft Addressing System ........... 329
Appendix to Chapter 9 . A World-wide Scheme
for the Allocation. Assignment and Application
of Aircraft Addresses . . . . . . . . . . . . . . . . . . . . . . . . . . 330
I . General . . . . . . . . . . . . . . . . . . . . . . . . . . . . 330
2 . Description of the scheme . . . . . . . . . . . . . . . . . 330
3 . Management of the scheme . . . . . . . . . . . . . . . . 330
4 . Allocation of aircraft addresses . . . . . . . . . . . . . 330
5. Assignment of aircraft addresses . . . . . . . . . . . . 330
6 . Application of aircraft addresses . . . . . . . . . . . . 331
Table 9.1 . Allocation of aircraft addresses to States 332
Chapter 10. Point-to-Multipoint Communications .... 337
10.1 Service via satellitc for the dissemination
of aeronautical information . . . . . . . . . . . . . . . . 337
10.2 Service via satellite for the dissemination of
WAFS products . . . . . . . . . . . . . . . . . . . . . . . . 337
PART I1 .VO ICE COMMUNICATION
SYSTEMS
Chapter 1. Definitions .........*........*. . ... 339
Chapter 2 . Aeronautical Mobile Service ........... 340
2.1 Air-ground VHF communication system
cha.racteristics . . . . . . . . . . . . . . . . . . . . . . . . . 340
2.2 System characteristics of the ground installation . . 340
2.3 System characteristics of the airborne installation . 342
2.4 Single sideband (SSB) HF communication system
characteristics for use in the aeronautical mobile
service . . . . . . . . . . . . . . . . . . . . . . . . . . . . 342
Chapter 3 . SELCAL System ................... 348
Chapter 4. Aeronautical Speech Circuits ........... 349
4.1 Technical provisions relating to international
aeronautical speech circuit switching
and signalling . . . . . . . . . . . . . . . . . . . . . . . . . 349
Chapter 5 . Emergency Locator Tkansmitter (ELT)
for Search and Rescue ........................ 350
5.1 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
5.2 Specification for emergency locator transmitters
(ELT) for search and rescue operating on
121.5 MHz . . . . . . . . . . . . . . . . . . . . . . . . . . . 350
5.3 Specification for UHF emergency locator
transmitter (ELT) operating on 406 MHz . . . . . . . 350
Appendix 1 to Chapter 5 . Emergency .Locator
Transmitter Coding . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
1 . Gencral . . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
2 . ELT coding . . . . . . . . . . . . . . . . . . . . . . . . . . . 353
ATTACHMENTS
Attachment A to Part I .Gui dance material for
aeronautical mobile-satellite service .............. 357
1 . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . 357
1.1 Overview . . . . . . . . . . . . . . . . . . . . . . . . 357
1.2 Levels of capability . . . . . . . . . . . . . . . . . 357
2 . Broadband RF characteristics . . . . . . . . . . . . . . . 358
2.1 Use of AMS(R)S bands . . . . . . . . . . . . . . 358
2.2 Frequency accuracy and compensation . . . . 358
2.3 Aircraft earth station antenna.characteristics 359
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