Using Digital Selective Calling (DSC) Features
Using Digital Selective Calling (DSC) Features
What is DSC?
Digital.Selective.Calling.or.DSC.is.a.standard.that.allows.you.to.call.other.
stations using their unique identification code (the Maritime Mobile Service
Identity.or.MMSI.number),.just.like.you.would.call.a.phone.number..To.call.
another.station,.just.enter.that.station's.MMSI.number.and.choose.the.
voice.channel.you.want.to.talk.on..The.radio.uses.channel.70.to.transmit.
your.MMSI.number.to.the.other.station.along.with.the.voice.channel.you.
requested..If.the.other.station.accepts.your.call,.both.radios.automatically.
switch.to.the.requested.voice.channel.so.you.can.talk.to.the.other.station.
DSC.provides.a.system.for.automated.distress.calls..At.the.touch.of.a.
button,.the.radio.can.transmit.your.MMSI.number,.the.nature.of.your.
distress,.and.your.current.position.based.on.data.from.your.GPS.receiver..
The.radio.repeats.the.distress.call.every.few.minutes.until.it.receives.an.
acknowledgement.
The.DSC.standard.dedicates.a.VHF.channel—channel.70—to.digital.
transmissions.only..Since.digital.transmissions.require.less.bandwidth.voice.
transmissions,.channel.70.avoids.the.problems.of.busy.voice.channels.
Advanced DSC features
The.VHF650.supports.the.following.DSC.features:
Feature
Individual.Call
Group.Call
All.Ships.Call
Position.Request
Position.Send
Name.and.MMSI.
Directory
Standby.Mode
Received.Call.Log Receive.Log
Menu Item
Individual
Group
All.Ships
POS.Request
Position.Send
Directory
Standby
Function
Contact.another.vessel.from.your.directory.
Contact.all.vessels.that.share.your.group.
MMSI.code.
Broadcast.to.all.vessels.within.range.(used.
for.safety.or.advisory.messages.)
Request.the.current.location.of.another.
vessel.
Transmit.your.current.location.to.another.
vessel.
Store.a.list.of.20.names.and.MMSI.
identification codes for DSC calls.
Automatically.respond.to.all.DSC.calls.with.
an."Unavailable".status.
Display.the.last.10.distress.calls.received.by.
the.radio.and.the.last.20.general.calls.
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