EMC assessment of shore-based electronic navigation (eNAV) infrastructure and new draft Standards for data exchange in the VHF maritime mobile band (156-174 MHz)
The 1997 ITU World Radio Conference (WRC-97), by request from International Maritime Organization (IMO) (NAV 43; 1997), designatedtwo upper legs of the duplex VHF public correspondence (VPC) channels, channels 87B and 88B, for the AIS globally. Following that frequency designation and the request for a technical standard for the AIS from IMO/NAV43, the ITU-R commenced drafting the AIS technical standard ITU-R M.1371 which also designated the Appendix 18 of the Radio Regulations (RR) channels 87B and 88B as the global ship-to-ship default channels for use on the high seas and globally unless otherwise designated by administrations within their territorial waters.