Digital selective calling (dsc) – Raymarine Ray54E User Manual
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Ray54E VHF Radio
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Programmable Secondary Priority (PLUS) Channel key
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ATIS operation, if required
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Private Channels (if so licensed)
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All Scan, Memory Scan and 2 Priority Scan functions
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Dual/Tri Watch Monitor modes
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Each channel displays an editable 12-character Channel Name
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Enhanced GPS Position Data gives Latitude and Longitude to 1/10,000
of a minute plus Time, SOG and COG data from any NMEA input
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Automatically distinguishes between calls made to Ship or Coast Stations
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Low and High Voltage detection with alarm
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User Mode provides easy access to favourite channels
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Key Beep volume adjustment (3 levels)
Digital Selective Calling (DSC)
The Ray54E includes equipment for Class “D” Digital Selective Calling
(DSC). DSC protocol is a globally applied system used to send and receive
digital calls. DSC uses a unique Maritime Mobile Service Identity (MMSI)
number to direct DSC calls directly to your radio, much like a telephone
number.When the DSC signal is received, the radio quickly switches over to
channel 70 and performs the corresponding operation.
Note: An MMSI number is required to operate the DSC equipment in this ra-
dio. You can request an MMSI number from the same agency that issues ra-
dio or Ship Radio licences in your area. Once obtained, you can program the
MMSI number yourself one time only using the menu operation described in
My MMSI ID on page 72.
The Ray54E includes the following DSC features:
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Separate receiver dedicated to handling DSC Calls on channel 70
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Position Request function sends GPS position data to or receives position
data from other stations
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Phonebook for automatically making DSC calls
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Quick Save feature saves incoming DSC Calls and the caller’s associated
MMSI number directly into the phonebook
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Quick Call feature sends Individual Calls or Group Calls directly from
the phonebook, just like the redial function on a telephone
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Three (3) Group IDs for making DSC Calls only to stations in your group,
such as a flotilla or fishing fleet
DSC functions are fully described in Chapter 5: