SERA.14001 General SERA.14005 Categories of messages SERA.14010 Flight safety messages SERA.14015 Language to be used in air-ground communication SERA.14020 Word spelling in radiotelephony SERA.14025 Principles governing the identification of ATS routes other than standard departure and arrival routes SERA.14026 Significant points SERA.14030 Use of designators for standard instrument departure and arrival routes SERA.14035 Transmission of numbers in radiotelephony SERA.14040 Pronunciation of numbers SERA.14045 Transmitting technique SERA.14050 Radiotelephony call signs for aircraft SERA.14055 Radiotelephony procedures SERA.14060 Transfer of VHF communications SERA.14065 Radiotelephony procedures for air-ground voice communication channel changeover SERA.14070 Test procedures SERA.14075 Exchange of communications SERA.14080 Communications watch/Hours of service SERA.14083 Radio communication failure procedures SERA.14085 Use of blind transmission SERA.14087 Use of relay communication technique SERA.14090 Specific communication procedures SERA.14095 Distress and urgency radiotelephony communication procedures SERA.14100 Notification of suspected communicable diseases or other public health risk on board an aircraft