Articles: VHF Radios

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VHF Antennas vs. VHF-AIS Antennas

I recently added a Transmitting AIS antenna to an existing (working) 8 foot Shakespeare VHF antenna with alarming results. It was giving me high VSWR alarms (3.5:1) despite it testing good (1.5:1) on the VHF.

Getting the Most of Your VHF DSC Radios

Around Yacht Clubs and Marinas the sharing of MMSI numbers is becoming more common and very useful for regattas and flotillas. With clubs, the number of MMSI numbers logged, groups can be quickly developed for events.

Three Good Reasons To Get An MMSI Number For Your Vessel

What is an MMSI number and why should I have one for my boat? If you purchased a VHF radio in the past couple of years, it is probably equipped with DSC (Digital Selective Calling). In order to use this function, you must have an MMSI or Maritime Mobile Service Identity number. This nine digit number, assigned free of charge by Industry Canada, identifies your vessel and allows you to send a distress alert to Coast Guard or communicate with other vessels.

Your MMSI Number: What You Need To Know

MMSI numbers are, like a phone number, a unique identifier for your boat. It should be noted that it's important to properly register your MMSI number. In Canada, when a boat changes hands, you must fill out an application to register the change of ownership with Industry Canada. This ensures that in the case of an emergency, the right people can be contacted as the application includes information on your vessel (useful for the Coast Guard) and emergency contact information.

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