New update GMDSS Regulations in effect 1 January 2024

July 25, 2023

New 4-digit channel numbers on marine VHF radiotelephones

In accordance with MSC.1/Circ.1460/Rev.3, all VHF models for SOLAS vessels must comply with the latest ITU Radio Regulations which requires new channels and expanded TX frequency range up to 161.600 MHz from 161.475 MHz.

These changes do not affect the GMDSS but the use of other frequencies for VHF meteorological, navigational, and urgent marine information broadcasts, port operations, and Vessel Traffic Service (VTS).

According to the new regulation, starting from January 1st, 2024, during the first Radio Survey, all fixed VHFs on board must meet the requirements of Appendix 18 of the Radio Regulations, which includes the availability of 4-digit channels. The new channel list is shown in the table on the right.

The new channel list — Click to enlarge the table

How to comply

To comply to the new channeling scheme, marine VHF radiotelephones should be able to show 4-digit channel numbers. A lot of older models cannot be updated to display channel numbers in four digits.

An example of leading models we have supplied:

Plan ahead

As a result of the prolonged global supply chain challenges, Radio Holland anticipates that the delivery of new VHF radiotelephones may experience significant lead times. If your vessel’s radio survey is scheduled for the first half of the year, Radio Holland suggests that you plan and take immediate action to avoid any inconvenience during your vessel’s radio survey in 2024.