MSC.1/Circ.1460/Rev.5 retains the requirement for VHF radiocommunication equipment to comply with the new channelling requirements by the first radio survey after 1 January 2028, but acknowledges that modifications may be needed earlier where applicable.

The latest revision of the circular has been amended to recognise that some VHF coastal stations may already have implemented the new VHF channel arrangements and no longer support the legacy VHF channels. Consequently, MSC.1/Circ.1460/Rev.5 states that:

“Ships should be capable of transmitting and receiving VHF radiotelephony with the shore facilities in their area of operation, noting that some administrations may have already implemented the new available channels prior to 1 January 2028.”

In such cases, ships’ VHF GMDSS equipment must be compatible with the frequencies and channelling arrangements set out in Appendix 18 of the ITU Radio Regulations (RR). The revised Appendix 18 introduces four-digit channel designations, replacing the previous two-digit channel format.

For newer VHF equipment that is not already compatible with the amended RR, compliance may be achieved through a software update. Older VHF equipment may need to be replaced.

What shipowners and operators should do now

Owners and operators are advised to check whether VHF coastal stations within their area of operation have implemented the new channel arrangements and determine whether updates are required ahead of the 2028 deadline. They should also consult their VHF GMDSS equipment manufacturer to confirm whether software updates or replacement equipment will be necessary.