Using Digital Selective Calling (Dsc) Features; What Is Dsc; Advanced Dsc Features; What Is An Mmsi Number - Uniden UM415 Owner's Manual

using Digital seleCtiVe Calling (DsC) Features

Digital Selective Calling (DSC) is a standard that allows you to call other stations using their

What is DsC?

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.
Your radio supports the following DSC features:

advanced DsC features

Feature
Individual Call
Group Call
All Ships Call
Position Request
Position Send
Test Call
Name and MMSI
Directory
Standby Mode
Received Call Log
In order to use DSC features, you must be assigned an MMSI number and program that

What is an MMsi number?

number into your radio. There are two kinds of MMSI numbers: individual numbers for
use by single boats and group numbers for use by fleets, boating organizations, event
coordinators, etc.
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Menu Item Function
Individual Contact another vessel from your directory.
Group Contact all vessels that share your group MMSI
code.
All Ships Broadcast to all vessels within range (used for
safety or advisory messages).
POS Request Request the current location of another vessel.
Position Send Transmit your current location to another
vessel.
Test Make sure your radio is working and configured
correctly/
Directory Store a list of 20 names and MMSI identification
codes for DSC calls.
Standby Automaticcally respond to all DSC calls within
an "Unavailable" status.
Receive Log Display the last 10 distress calls received by the
radio and the last 20 general calls.
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