NOTE:
The device disables DSC automatically when you turn
on ATIS (
Automatic Transmitter Identification System
).
Entering Your MMSI Number
NOTICE
You can enter your MMSI number only once. If you must change
your MMSI number after entering it, you must take your radio to
your Garmin
®
dealer for reprogramming.
The Mobile Marine Safety Identity (MMSI) number is a nine-digit
code that acts as a DSC self-identification number, and it is
required to use the DSC capabilities of your radio. You can
obtain an MMSI number from the telecommunications authority
or ship registry for your country. In the USA, you can obtain an
MMSI number from these sources:
• Federal Communications Commission (FCC): assignments
are recognized internationally
• BoatU.S.
®
, Sea Tow
®
, or United States Power Squadrons
®
:
assignments are for USA waters only.
1
Select
MENU
>
DSC
>
MY MMSI
.
2
Enter your MMSI number (
).
3
Select
ACCEPT
.
The radio prompts you to confirm your identity.
4
Enter your MMSI number again, and select
ACCEPT
.
If the MMSI numbers you entered do not match, a message
appears.
5
If necessary, select
RETRY
, and enter the number again.
Viewing Your MMSI Number
Select
MENU
>
DSC
>
MY MMSI
.
Distress Calls
When you make a distress call, your call is transmitted to all
DSC-capable radios within receiving range. Your current GPS
position (latitude and longitude) and the current time are
included in the transmission if you have a GPS device
connected to your transceiver. If you manually entered your
position information with the time, that data is transmitted with
the call.
NOTE:
You should familiarize yourself with the standard
distress-call format and protocol to ensure your calls are clear
and effective.
Sending an Undesignated Distress Call
When you send an undesignated distress call, the nature of your
emergency is not transmitted to the receiving stations. Sending
an undesignated distress call is a faster procedure that can save
you time during an emergency.
1
Lift the spring-loaded door, and hold
DISTRESS
for at least 3
seconds.
The radio beeps and counts down the seconds. DISTRESS
CALL COUNTING DOWN appears on the screen.
The radio sounds an alarm, switches to channel 70, and
transmits your call on high (25 W) power.
2
Press any key to silence the alarm sound.
The radio tunes to channel 16 on high (25 W) power.
3
Select
PTT
on the handset or radio to relay your distress
message.
The radio waits for an acknowledgment (ACK) on channel 70
from a listening station.
Sending a Designated Distress Call
When you send a designated distress call, the nature of your
emergency is transmitted to the receiving stations.
1
Lift the spring-loaded door, and press
DISTRESS
.
2
Turn the
SELECT
dial, and select the type of distress call.
TIP:
You can select CLEAR to exit the screen without
sending a distress call.
3
Hold
DISTRESS
for at least three seconds.
The radio beeps and counts down the seconds. DISTRESS
CALL COUNTING DOWN appears on the screen.
The radio sounds an alarm, switches to channel 70, and
transmits your call on high (25 W) power.
4
Press any key to silence the alarm sound.
The radio tunes to channel 16 on high (25 W) power.
5
Select
PTT
on the handset or radio to relay your message.
The radio waits for an acknowledgment (ACK) on channel 70
from a listening station.
Waiting For and Receiving and Acknowledgment for a
Distress Call
If the radio does not receive an acknowledgment for a distress
call, the radio retransmits the distress call randomly between 3.5
to 4.5 minutes later, and continues to retransmit the distress call
at random intervals until the radio receives an acknowledgment.
When the radio receives the acknowledgment, it begins beeping
and DISTRSS ACK appears on the screen.
1
Press any key to turn off the beeping.
2
Select to view additional information.
TIP:
If the MMSI of the station transmitting the
acknowledgment signal is an entry in your directory, the
name associated with the MMSI number appears on the
screen. If the MMSI of the station is not in your directory, the
MMSI number appears on the screen.
3
Select
ACCEPT
.
Stopping Automatic Retransmission of Distress Calls
Select
CANCEL
.
The radio remains tuned to channel 16.
NOTE:
Selecting CANCEL ends the automatic repetition of
the call, but does not communicate to other stations that you
no longer have an emergency. If you no longer have an
emergency, you should revoke the distress call (
).
Revoking a Distress Call
You do not transmit a distress call until you hold DISTRESS for
at least three seconds. If you inadvertently make a distress call,
or are no longer in distress, you should cancel the call
immediately by transmitting a voice message to all stations on
channel 16.
1
Select
CANCEL
>
YES
, and wait until
DISTRESS CANCEL
HAS BEEN SENT
appears on the screen.
2
Select
OK
.
3
Hold
PTT
on the handset, and transmit an appropriate voice
message to cancel the distress call (
).
4
Select an option:
• Select
END
to complete the distress-call cancellation and
return to normal radio operation.
• Select
RESEND
to resend the distress-call cancellation
and start the process again.
Distress Call Cancellation Script
When you revoke a DSC distress call (
), you should transmit an appropriate cancellation
message.
For example, "All stations, all stations, all stations, this is
_____(vessel name), MMSI number ____, position ____(North
Digital Selective Calling
5
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