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NorthStar EXPLORER 721EU User Manual

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www.nort hstarnav.com
Explorer 721US / 721EU
Explorer 725US / 725EU
VHF Marine Radio
Operation and Installation Manual

Table of Contents

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NorthStar EXPLORER 721EU Specifications

General IconGeneral
Transmit Power25W/1W
Waterproof RatingIPX7
Display TypeLCD
GPSYes
Voltage Range13.8 VDC
Output Power25W
Weight1.2 kg

Summary

Important Safety Information

Safety Alert Symbol Definitions

Defines DANGER, WARNING, and CAUTION safety alert symbols used in the manual.

Section 1 - General Information

1-1 Features

Lists the key features and capabilities of the Northstar VHF Explorer radio.

Section 7 - Install the Explorer 721/725

7-1 Installation Options

Describes gimbal and recessed installation methods for the radio.

7-9 Set Up the Radio

Covers the initial setup procedures after installation.

7-11 The Completed Installation (with Optional 701 Handset)

Shows the final installation layout with an optional handset.

7-2 Location Requirements

Lists critical factors for choosing a suitable installation location.

Section 2 - The Radio Menu (MENU)

Section 3 - Radio Setup Menu (RADIO SETUP)

3-1 Radio Setup Menu Options

Provides an overview of the radio setup menu options.

Section 4 - DSC SETUP Menu

4-2 DSC SETUP Menu Options

Outlines the available options within the DSC setup menu.

Section 5 - Send and Receive DSC Calls

5-1 DSC CALL Menu Options

Overview of the options available in the DSC CALL menu.

5-2 Call an Individual

Instructions for making individual DSC calls to other vessels.

5-3 Call the Most Recent Caller

Enables calling the most recent incoming caller from the DSC log.

5-4 Call a Group

Details on making DSC calls to pre-defined contact groups.

5-5 Call All Ships

Instructions for sending an 'All Ships' DSC call.

5-8 Request the LL Position of a Buddy

Allows requesting the Latitude/Longitude position of a buddy.

5-9 Track Your Buddy

Provides functionality to track the position of selected buddies.

Section 6 - Distress Calls

6-1 Send a Distress Call

Step-by-step guide on how to send a DSC distress call.

6-3 Receive a Distress Call

Details how the radio displays and handles incoming distress calls.

6-2 Receive a Distress Acknowledgement

Explains the process of receiving a distress call acknowledgement.

6-4 Receive a Distress Relay

Describes how distress relay transmissions are received and processed.

6-5 Relay a Distress Call from the Distress Log

Instructions on how to relay a distress call from the log.

Appendix B - Troubleshooting

Troubleshooting Power Up Issues

Addresses issues where the transceiver does not power up.

Troubleshooting Fuse Blowing

Helps diagnose why the transceiver blows the fuse when powered on.

Troubleshooting Low Power Transmissions

Addresses transmissions remaining on low power even when high power is selected.

Troubleshooting No Position Information

Helps diagnose issues with no position information being displayed.

Appendix E - MMSI and License Information

E-2 Enter Your User MMSI

Provides instructions for entering the user MMSI into the radio.

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