Glossary

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Glossary

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ALRS

The UK Hydrographic Office series of ALRS publications (6 Volumes) is
a comprehensive source of information covering all aspects of Maritime
Communications.

ALRS Volume 5

Admirality List of Radio Signals Volume 5 is a publication published by The United Kingdom Hydrographic Office. It contains a lot of up to date and well structured information about GMDSS:
  • Worldwide communication requirements for distress, search and rescue,
  • The only SOLAS compliant guide for GMDSS published in English,
  • Colour diagrams depicting worldwide operational DSC ranges,
  • Essential information for GMDSS students,
  • Easily updated from weekly Admirality Notices for Mariners,
  • Revised annually.

AOR-E

AOR-E is Atlantic Ocean Region East. This region is one of the four Inmarsat satellite coverage areas

AOR-W

AOR-W is Atlantic Ocean Region West. This region is one of the four Inmarsat satellite coverage areas

ARQ

Automatic Request for Repetition, telex mode used to send mainly routine messages from one transmitter to one receiver