User's Manual
Table Of Contents
- Section 1 - General Information
- Section 2 - The Radio Menu (MENU)
- 2-1 The Radio Menu Options (MENU)
- 2-2 Show Weather, SNR or Happy Fish on Handset (INFO DATA)
- 2-3 Maintain Your Buddy List (BUDDY LIST)
- 2-4 Local or Distance Sensitivity (LOCAL/DIST)
- 2-5 Backlighting (BACKLIGHT) and Contrast (CONTRAST)
- 2-6 GPS Data and Time (GPS/DATA)
- 2-7 GPS Simulator (GPS SIM)
- 2-8 Reset to Factory Defaults (RESET)
- 2-9 Subscribe or Un-Subscribe the 705 handset (HS SETTING)
- Section 3 - Radio Setup Menu (RADIO SETUP)
- 3-1 The Radio Setup Menu Options (RADIO SETUP)
- 3-2 Select the Channel Bank (UIC) (US only)
- 3-3 Change Channel Names (CH NAME)
- 3-4 Ring and Beep Volume (RING VOLUME and KEY BEEP)
- 3-5 Internal Speaker Connections (INT SPEAKER)
- 3-6 Set the Priority Channel (WATCH MODE)
- 3-7 Weather Alert (WX ALERT) (US only)
- 3-8 NMEA or NAVBUS protocol (COM PORT) (721 / 725 only)
- 3-9 Barometric Displays (BARO SENSOR)
- 3-10 Temperature Display (TEMPERATURE)
- 3-11 HAPPY FISH Alarm ON or OFF
- Section 4 - DSC SETUP Menu
- 4-1 What is DSC?
- 4-2 DSC SETUP Menu Options
- 4-3 Check Your User MMSI (USER MMSI)
- 4-4 Maintain Your Groups (GROUP SETUP)
- 4-5 Response to Individual Calls (INDIV REPLY) (US only)
- 4-6 ATIS MMSI & ATIS Functionality (EU only)
- 4-7 DSC Functionality (DSC FUNC)
- 4-8 Response Type to LL Polling Calls (LL REPLY)
- 4-9 Mute the Notification Ringtone
- Section 5 - Send and Receive DSC Calls
- 5-1 The DSC CALL Menu Options
- 5-2 Call an Individual (INDIVIDUAL)
- 5-3 Call the Most Recent Caller (LAST CALL)
- 5-4 Call a Group (GROUP)
- 5-5 Call All Ships (ALL SHIPS)
- 5-6 Call using the Call Log (CALL LOG)
- 5-7 Call using the Distress Log (DIST LOG)
- 5-8 Request the LL Position of a Buddy (LL REQUEST)
- 5-9 Track Your Buddy (TRACK BUDDY)
- 5-10 Receive an All Ships Call (RCV: ALL SHIP)
- 5-11 Receive an Individual Call (RCV: INDIV)
- 5-12 Receive a Group Call (RCV: GROUP)
- 5-13 Receive a Geographic Call (RCV: GEOGRAPH)
- 5-14 Receive a Polled Position Call (RCV:POSITION)
- Section 6 - Distress Calls
- Appendix A - Technical Specifications
- Appendix B - Troubleshooting
- Appendix C - VHF Marine Channel Charts
- Appendix D - EU Inland Waterway Channels
- Appendix E - MMSI and License Information
- Section 7 - Install the Explorer 721/725
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Northstar Explorer VHF Series: 721/725 Operation and Installation Manual
6-3 Receive a Distress Call (RCV: DISTRESS)
An alert sounds when a distress call (DISTRESS!)
is received. Press any key to cancel the alert. You
don’t need to send an acknowledgement.
The radio automatically selects CH16 and
displays the details of the distress call on the
screen. Press PTT to establish voice contact.
The details are displayed over two screens that alternate every 1.5 seconds; the first screen shows
the user MMSI and nature of the emergency (if specified), the second screen shows the time and the
location (if specified). If the location and time aren’t specified, they’re replaced with sequences of 9s and
8s respectively.
The radio is capable of receiving enhanced LL position data if the vessel transmitting the distress call is
sending this. This provides the position of the distressed vessel to within 60 ft (20 m).
6-4 Receive a Distress Relay (RCV: DISTRESS RELAY)
Alternating
DISTRESS
RELAY FROM
123456789
ESC –> EXIT
FLOODING
987654321
82º50.003’N
27º45.543’W
An alert sounds when a distress relay (DISTRESS RELAY) is received from an individual or from an All Ships
transmission. Press any key to cancel the alert.
Try to make voice contact with the calling vessel. Maintain a listening watch on CH16 and standby to lend
assistance.
6-5 Relay a Distress Call from the Distress Log (RELAY)
You can relay a Distress Call in your Distress Log to an Individual or to All Ships.
1. Press CALL/MENU to enter the DSC CALL menu, then select DIST LOG (see Section 5.8).
987654321
DELETE
SAVE MMSI
> RELAY
RELAY
> INDIV RELAY
ALL RELAY
INDIV RELAY
> MANUAL NEW
BUDDY1
BUDDY2
2. The most recently received distress call Is the first entry (01) in the Distress Log. Select the distress call
that you want to relay, then select RELAY.
3. Now select either:
• INDIVRELAYtorelaythedistresscalltoanindividualandselectMANUALNEWifthepersonisnot
in your buddy list, otherwise scroll to the name of your buddy. Press ENT or push the rotary knob.
(If you selected MANUAL NEW, you need to enter the user MMSI then press ENT or push the
rotary knob.)
• ALLRELAYtorelaythedistresscalltoAllShipsthenpressENTorpushtherotaryknob.
4. TheradioautomaticallyselectsCH16(forallrelay)ormanuallysettheworkingCH(INDIVRELAY)and
displays the details of the distress call on the screen.
5. Press ENT or push the rotary knob to relay the Distress Call.
123456789
DISTRESS
FLOODING
ESC –> EXIT
123456789
10:34 UTC
82º50.003'N
27º45.543'W