AI 1.9.1 Maritime AIS

Agenda item 1.9.1

1.9              to consider, based on the results of ITU-R studies:

1.9.1           regulatory actions within the frequency band 156-162.05 MHz for autonomous maritime radio devices to protect the GMDSS and automatic identifications system (AIS), in accordance with Resolution 362 (WRC-15);

Resolution 362 (WRC‑15)Autonomous maritime radio devices operating in the frequency band 156-162.05 MHz

An AMRD is a mobile station; operating at sea and transmitting independently of a ship station or a coast station.

The aim of this agenda item is to prevent unregulated operation of autonomous maritime radio devices (AMRD). This will enhance safety of navigation and ensure the integrity of the global maritime distress and safety system (GMDSS). The GMDSS is the only system for distress, urgency, safety and routine communication for general shipping. Furthermore, the integrity of the collision avoidance system, automatic identification system (AIS), including the AIS VHF data link needs to be ensured.

The AMRD are grouped and identified as AMRD Group A that enhance the safety of navigation and AMRD Group B that do not enhance the safety of navigation. Signals or information which does not concern the vessel can distract or mislead the navigator and degrade the safety of navigation.

The criterion for distinguishing the two categories of AMRD is the influence on the safety of navigation. Any signal or information originated by an AMRD, which reaches the navigator, may influence the safety of navigation. This includes AIS. AIS information results in symbols to be shown on radar and on the electronic chart display and information system (ECDIS).

Four methods to satisfy this agenda item were developed.

Method A considers amendments to the footnote f) in RR Appendix 18 to allow AMRD Group A to operate on certain channels.

Under Method B, there are three approaches to consider the harmonisation of the spectrum use for AMRD Group B.

Method B1 proposes the use of channel 2006 as listed in RR Appendix 18 for AIS technology.

Method B2 proposes the use of channel 2006 in RR Appendix 18 for AIS technology and channels 2078, 2019 and 2079 in RR Appendix 18 for non-AIS technology.

Method B3 proposes the use of channel 2006 in RR Appendix 18 for AIS technology and channels 2078, 2019 and 2079 in RR Appendix 18, for non-AIS technology, with an e.i.r.p. limitation inserted in the RR.


CEPT considers that only an additions in the Radio Regulations Appendix 18 are required to enable AMRD to operate AIS technology.