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- Distress and safety communications
* CHAPTER VIII - Aeronautical services
* CHAPTER IX - Maritime services
* CHAPTER X - Provisions for entry into force of the Radio Regulations

Volume 2 - Appendices
Volume 3 - Resolutions and Recommendations
Volume 4 - ITU-R Recommendations incorporated by reference
Maps to be used in relation to Appendix 27

Definitions

The Radio Regulations define:
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