RECOMMENDATION
ITU-R M.1842-1
Characteristics of VHF radio systems and equipment for the exchange of
data and electronic mail in the maritime mobile service RR Appendix 18 channels
Scope
Annex 1 VHF data system example 1
1 General characteristics
2 Transmitters
3 Receivers
4 Sample emissions spectrum based on variations
of ETSI TETRA standard modulation
5 Conclusions on emissions
6 System interoperability
6.1
Ship-to-shore
6.2
Shore-to-ship
6.3
Ship-to-ship
6.4
Efficient use of the VHF data link (VDL)
Annex 2 VHF data system example 2
1 General characteristics
2 Transmitters
3 Receivers
4 Possibilities and advantages
4.1
Coverage and stability
4.2
IP – Ethernet
4.3 Fixed
IP address at the radio on board the ship
4.4
Always connected
4.5
Several services in parallel from one radio on the ship
4.6
Automatic reconnection after disruption
4.7
Integrated data router
4.8
Several inputs to the radio
4.9
Connection to local WLAN
4.10
External communication carriers
5 Applications
6 System interoperability
6.1
Ship-to-shore
6.2
Shore-to-ship
Annex 3 VHF data system 50 kHz wideband example
1 General
characteristics
2 Transmitters
3 Receivers
4 System
interoperability
4.1
Ship-to-shore
4.2
Shore-to-ship
4.3
Ship-to-ship
4.4
Efficient use of the VHF data link (VDL)
Annex 4 VHF data system 100 kHz “wideband” example
1 General
characteristics
2 Transmitters
3 Receivers
4 System
interoperability
4.1
Ship-to-shore
4.2
Shore-to-ship
4.3
Ship-to-ship
4.4
Efficient use of the VHF data link (VDL)