The selective calling feature is just one of the host of options available to DSC capable radios. The selectively called DSC always monitors channel 70 and when a message directed to the radio or an emergency message is received, the radio sounds an alarm (audio tone) and display a message. The message will be sent on channel 70 (channel 70 is reserved for digital calling only! No voice calling allowed on channel 70). One selects a MMSI number from the radio’s stored MMSI list, composes a message (the message could be to join the caller on channel 9, 68, 69, 71, 72 or 78 for a conversation) and sends the message. The DSC capable radio process is similar. A receiving phone gets the massage and gives an alert. This feature is similar to a texting, where one selects one or more phone numbers, composes a message and sends the message. This would be the quickest way to get a response to an emergency.Īnother communication feature of the DSC capable radio is the ability to call other DSC radio or a group of radios selectively. The formatted data digital message will include the hailing vessel’s name, GPS location of the vessel and the nature of distress.
The most important feature is that the radio can quickly send out a formatted digital distress call to the Coast Guard and all DSC radios near your location. The DSC capable radio supports a host of safety and convince features. Does your marine VHF radio have a red flap labeled DISTRESS? If yes, then you most likely have a radio capable of Digital Selective Calling (DSC).
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