ITU

List IV List of Coast Stations and Special Service Stations 2025

2025 Edition


List IV contains important information for the mariner in relation to radio communications, including the GMDSS (Global Maritime Distress and Safety System) and CP (Public Correspondence) services.

Detailed information is provided in relation to the facilities available at each maritime coast radio station, which may provide watch-keeping using digital selective calling (DSC) techniques and radio telephony. Also included are receive and transmit frequencies, as well as the geographical coordinates for each station.

List IV also lists details of additional services such as medical advice, navigational and meteorological warnings, MSI (Maritime Safety Information), AIS (Automatic Identification System), meteorological bulletins and radio time signals, along with the hours of service and operational frequencies. It also contains information on port stations, pilot stations, coast Earth stations, VTS stations, contact information of RCC (Rescue Coordination Centers), SAR agencies, Navarea coordinators and AtoNs (AIS Aids to Navigation).

List V - List of Ship Stations and Maritime Mobile Service Identity Assignments

List V is published annually, as per the Radio Regulations this publication shall be provided to all ship stations for which a Global Maritime Distress and Safety System (GMDSS) installation is required by international agreement.
List V incorporates a searchable database of over nine hundred thousand ships.

It contains details of Maritime Mobile Service Identities for search and rescue aircraft, coast stations, and groups of ship stations. It also provides contact information for accounting authorities and notifying administrations.

New edition released annually in April or May.

Manual for use by the Maritime Mobile and Maritime Mobile Satellite Services

The Manual for Use by the Maritime Mobile and Maritime Mobile-Satellite Services is published in accordance with Article 20 (No. 20.14) of the Radio Regulations and results from studies carried out in the ITU-R since 2008. Volume 1 provides descriptive text of the organization and operation of the GMDSS and other maritime operational procedures, while Volume 2 contains the extracts of the regulatory texts associated with maritime operations. CD-ROM format.