Admiralty list of radio signals. Vol 5 NP285 (ALRS). Global maritime distress and safety system (GMDSS). 2023

Издание на английском языке
The Third Edition (2022) of ALRS Volume 5 contains the latest information received by the UKHO.
All reasonable effort has been made to ensure that this Volume contains all of the information obtained and assessed by the UKHO by the date of publication. Information received after that date will be included in Section VI of the Weekly Edition of ADMIRALTY Notices to Mariners.
This edition supersedes the Second Edition (2021) which is cancelled.

ADMIRALTY List of Radio Signals (ALRS) provides a comprehensive source of information on all aspects of Maritime Radio Communications. The purpose of this Volume is to provide information on the following topics:
-Worldwide Communications Requirements for the Global Maritime Distress and Safety System (GMDSS)
-Distress Communications and Operational Procedures
-SOLAS Regulations
- Extracts from ITU Regulations
- Navtex and Maritime Safety Information
- Distress and Search & Rescue (incorporating MRCC & MRSC Contacts)
- Worldwide Operational DSC Ranges and Search and Rescue (SAR) Regions

Contents
Directions for updating this volume
Record of updates
Annual Notices to Mariners
Contents
Preface
Purpose of ADMIRALTY Radio Signals
How to report new or suspected dangers to navigation or changes observed in aids to navigation
Feedback
UKHO contact details
How to obtain Admiralty Charts and Publications
Related ADMIRALTY Publications and their contents
General information
Abbreviations and Glossary
GLOBAL MARITIME DISTRESS AND SAFETY SYSTEM (GMDSS)
Introduction
Operational Details
Descriptions of GMDSS Sea Areas
Basic Equipment for SOLAS Ships
Sub-systems
Functional requirements of the GMDSS
Availability of radio equipment
Radio personnel requirements
The Terrestrial Communication System
The Digital Selective Calling (DSC) Sub-system
Structure and content of the DSC call
MMSI numbers
Watchkeeping
Radiotelephone procedures
Radiotelex (NBDP) procedures
General business and commercial communications
Radio regulations
COMMUNICATIONS SYSTEMS FOR USE IN THE GMDSS
Terrestrial Communications
Satellite Communications
Inmarsat
Iridium GMDSS Services
Cospas-Sarsat System
SOLAS REGULATIONS
Regulation 6 - Radio Installations
Regulation 7 - Radio Equipment: General
Regulation 8 - Radio Equipment: Sea Area A1
Regulation 9 - Radio Equipment: Sea Areas A1 and A2
Regulation 10 - Radio Equipment: Sea Areas A1, A2 and A3
Regulation 11 - Radio Equipment: Sea Areas A1, A2, A3 and A4
Regulation 12 - Watches
Regulation 13 - Sources of Energy
Regulation 14 - Performance Standards
Regulation 15 - Maintenance Requirements
Regulation 16 - Radio Personnel
Regulation 17 - Radio Records
Regulation 18 - Position-updating
DISTRESS COMMUNICATIONS AND FALSE ALERTS
Part A - Distress Communications
Part В - False Alerts
IMO Guidelines for Avoiding False Distress Alerts
Maritime Safety Information (MSI) under the GMDSS
HF NBDP Maritime Safety Information Broadcast Service
Procedures for sending a distress relay
Distress Acknowledgements
OPERATIONAL PROCEDURES FOR THE USE OF DSC EQUIPMENT IN THE MARITIME MOBILE SERVICE.
Summary
ANNEX 1: Provisions and procedures for distress, urgency and safety calls
ANNEX 2: Provisions and procedures for routine calls
ANNEX 3: Operational procedures for digital selective calling communications on MF, HF and VHF
ANNEX 4: Operational procedures for coast stations for digital selective calling communications of MF, HF and VHF
ANNEX 5: Man overboard devices using VHF DSС
ANNEX 6: Frequencies used for DSC
SEARCH AND RESCUE RADAR TRANSPONDER
Introduction
Operational and Technical Characteristics
Operation of Marine Radar for SART Detection
AIS-SART
EPIRB-AIS
EXTRACTS FROM THE ITU RADIO REGULATIONS
ARTICLE 30 - General provisions
Section I - Introduction
Section II - Maritime provisions
Section III - Aeronautical provisions
Section IV - Land mobile provisions
ARTICLE 31 - Frequencies for the GMDSS
Section I - General
Section II - Survival Craft Stations
Section III - Watch-Keeping
ARTICLE 32 - Operational Procedures for Distress and Safety Communications in the GMDSS
Section I - General
Section II - Distress Alerting and Distress Calling
Section III - Distress Traffic
ARTICLE 33 - Operational Procedures for Urgency and Safety Communications in the GMDSS
Section I-General
Section II - Urgency Communications
Section III - Medical Transports
Section IV - Safety Communications
Section V-Transmission of Maritime Safety Information
Section VI - Intership Navigation Safety Communications
Section VII - Use of Other Frequencies for Safety
ARTICLE 34 - Alerting Signals in the GMDSS
Section I - Emergency Position-Indicating Radio Beacon (EPIRB) and Satellite EPIRB Signals
Section II - Digital Selective Calling
THE MANAGEMENT OF VHF
Proper use of VHF Channels at sea
Guidelines of the use of VHF at sea
Range of VHF
The Use of Mobile Telephones in Distress and Safety Communications
Table of Transmitting Frequencies in the VHF Maritime Mobile Band
Notes Referring to the Table
VHF DSC, list of Coast Stations for Sea Area A1
MF DSC, list of Coast Stations for Sea Area A2
HF DSC, list of Coast Stations for Sea Areas A3 and A4
Operational HF DSC Stations for Sea Areas A3 and A4
Maritime Safety Information (MSI) under the GMDSS
HF NBDP Maritime Safety Information Broadcast Service
Promulgation of Maritime Safety Information
The Enhanced Group Call (EGC) Services
Navigational Warnings for the World-Wide Navigational Warning Service (WWNWS)
Web Portal for IMO/WMO Worldwide Met-Ocean Information and Warning Service (WWMIWS)
NAVAREA Coordinators
EGC SERVICES
Inmarsat-The International SafetyNET system
Iridium - The International SafetyCast System
NAVAREA and METAREA diagrams
EGC MSI Broadcast Systems Operational Information
NAVAREA Broadcast Information
METAREA Broadcast Information
EGC ANNEX
NAVTEX
Introduction
Reception
1. Definitions
2. Principal features of NAVTEX
3. Language and National Broadcast Options
Message Priorities
Transmitter Identification Character
Subject Indicator Character
Message Numbering
Common abbreviations for the International NAVTEX Service
Revised Performance Standards for NAVTEX Receivers
Practical Instructions for the use of a NAVTEX receiver
NAVTEX receiver Check-off list
Stations with Operational NAVTEX Facilities
NAVTEX - Index of Diagrams
DISTRESS, SEARCH AND RESCUE
International Aeronautical and Maritime Search and Rescue (IAMSAR) Manual
Search and Rescue contacts
ANNEX 1: UK Distress and Rescue at Sea - Vessels and Aircraft
Maritime Search and Rescue Regions (SRR) and DSC Area Diagrams
Country Index of Stations and Services
International Call Sign Series
Maritime Identification Digits
Phonetic Alphabet and Figure Code
International Code of Signals
Certificate of Authenticity