Raymarine Ray218, Owner'S Handbook Manual

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Appendix E: Glossary
Term Meaning
All Scan A feature that scans all channels in the channel set.
All Ships Call A DSC call that sends out a message to all vessels within range.
The Ray218/Ray55 can make two different types of All Ships
calls: Safety Calls for advisory alerts or Urgency Calls when
assistance is required but there is no imminent danger to the
vessel.
Canadian Channels Channel designations as defined by Industry Canada.
CH Channel selection key
COG Course Over Ground
Distress Call A DSC call notifying other ships and shore stations that your
vessel is in imminent danger, sending your position and time
information, along with (optionally) the nature of your distress
situation.
DSC Digital Selective Calling (DSC) is a system used to send digital
messages to stations identified by a unique MMSI number. Con-
tained within the message is the working channel on which
voice communications are to be made. DSC enables you to
make digital Distress Calls and to specify the stations that you
wish to contact: an Individual station, all stations within a spec-
ified Group, or All Ship stations within range.
Dual Watch A feature that monitors the Priority Channel 16 and one other
channel that you choose.
FCC Federal Communications Commission (US)
Global Positioning
System A navigational system that uses satellite signals to determine
the latitude and longitude of a receiver on Earth.
GPS Global Positioning System
Group Call A DSC call that sends transmissions only received by radios
sharing a common Group MMSI number, such as a flotilla or
racing fleet.
Individual Call A DSC Call made to a specific station identified by its MMSI ID.
International Channels Channel designations as defined by the ITU
ITU International Telecommunications Union (EU)