Operation Manual

Section 8 - Sending and receiving DSC Calls
WARNING
A valid USER MMSI must be entered into this radio before these DSC functions can be
used. See section 5-1.
8-1 What is DSC?
DSC (Digital Selective Calling) is a semi-automated method of establishing VHF, MF, and HF
radio calls. It has been designated as an international standard by the IMO (International
Maritime Organization) and is part of the GMDSS (Global Maritime Distress and Safety
System).
Currently, you are required to monitor Distress Channel 16, but DSC will eventually replace
listening watches on distress frequencies and will be used to broadcast routine and urgent
maritime safety information.
DSC enables you to send and receive calls from any vessel or coast station that is equipped
with DSC functionality and within geographic range. Calls can be categorized as distress,
urgency, safety, or routine, and DSC selects a working channel automatically.
8-2 Sending DSC Calls
You can call any other person that has another DSC equipped radio.
• Quick press the CALL / MENU key to access the following DSC CALL menu options – select
LAST CALL to quickly call back the person who called you.
• Note that only four DSC CALL menu options can be shown on the LCD at any one time.
• Press + or – on the microphone or turn the Channel Select knob on the base station to
scroll up or down through the menu until the cursor is positioned at the desired option.
Press ENT (the center of the Channel Select knob) to display that option.
The following options are available:
DSC CALL INDIVIDUAL Make a DSC Call Section 8-3
LAST CALL Repeat the last DSC Call Section 8-5
GROUP Make a Group DSC Call Section 8-6
ALL SHIPS Make an All Ships DSC Call Section 8-7
CALL LOG View DSC Call Log Section 8-8
DISTR LOG View DSC Distress Log Section 8-9
SENT CALL View DSC Sent Call Log Section 8-10
LL REQUEST Request a position report Section 8-11
TRACK BUDDY Automatically track Buddy’s Section 8-12
DSC TEST Make a DSC Test Call Section 8-13
MMSI/GPS View MMSI and GPS information Section 8-14
8-3 Send an individual call (INDIVIDUAL)
Call to a Buddy
DSC CALL
►INDIVIDUAL
LAST CALL
GROUP
ALL SHIPS ▼
INDIVIDUAL
►ROUTINE
SAFETY
URGENCY
INDIVIDUAL
MANUAL NEW
►MERMAID IV
SEAROSE
CHOOSE CH
►INTER-SHIP
MANUAL
MERMAID IV
INDIVIDUAL
ROUTINE
►SET INTER
MERMAID IV
INDIVIDUAL
ROUTINE
►SEND?
MERMAID IV
INDIVIDUAL
ROUTINE
WAIT.. 00:00
INDIVIDUAL
ROUTINE
ACK FROM
MERMAID IV
▼ 00:00
Call to others
DSC CALL
►INDIVIDUAL
LAST CALL
GROUP
ALL SHIPS ▼
INDIVIDUAL
ROUTINE
SAFETY
URGENCY
INDIVIDUAL
MANUAL NEW
MERMAID IV
SEAROSE
MANUAL MMSI
0
CHOOSE CH
►INTER-SHIP
MANUAL
678912345
INDIVIDUAL
ROUTINE
SEND?
678912345
INDIVIDUAL
ROUTINE
CALLING...
678912345
INDIVIDUAL
ROUTINE
WAIT.. 00:00
1. Select DSC CALL then INDIVIDUAL.
2. Select the priority level: ROUTINE, SAFETY, URGENCY.
3. Select the buddy you want to call from your buddy list - or Select MANUAL NEW then
enter the MMSI of the individual you want to call and press ENT.
4. Choose a working channel to talk on. Select the INTER-SHIP and press ENT. The radio
automatically lists all Inter-ship (Simplex) channels that can be used. Duplex channels
cannot usually be called, however, If you wish to use a Duplex channel, select MANUAL
instead, then select your channel of choice. If the call is to a Coast Station (MMSI begins
with 00) the radio will recognize this and specify the correct channel to talk on.
5. Press ENT to SEND the call. Channel 70 is selected automatically and the Tx symbol is
shown on the LCD while the call is being sent.
6. The radio waits for an acknowledgement (WAIT). If the call is acknowledged (INDIV ACK)
press PTT to talk. Rotate the Channel Select knob to view additional options.
7. If there is no reply (UNABLE TO ACKNOWLEDGE) a message asks if you want to retry
(SEND AGAIN?). Press ENT to retry the call.
Simrad - RS35 Operation InstructionsSimrad - RS35 Operation Instructions 4746