My marine radio keeps using "dsc" but I am dumb enough not to know what it stands for...some one please help. Thanks
Definiton of "dsc"
- Thread starter tadd5181
- Start date
Digital Selective Calling - standard for sending pre-defined digital messages via the medium frequency (MF), high frequency (HF) and very high frequency (VHF) maritime radio systems
Not quite. DSC reserves VHF channel 70 to send and receive encoded digital messages. A header on these messages includes the unique MMSI (the selective part) of the recipient. The rest is payload; the actual message intended for the recipient. This might be a invite to join a voice transmission on a selected channel, a request for your location, or a Rescue 21 'mayday' hail with encode lat/long intended for the USCG.
Read all about it at the link below. But you can now get this set-up in hand held VHF radios that are DSC plus have GPS, like the Standard Horizon HX870.
http://wow.uscgaux.info/content.php?unit=170&category=dsc-vhf-radio-rescue-21
http://www.standardhorizon.com/inde...73FCD911FF7D468A2E1&DivisionID=3&isArchived=0
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I remember when it was called "SelCal" and was used primarily in aviation. However, a lot of land stations would also use it. It would be an identifier sent by Station X to call Station Y. Back then, receivers would be on but their squelch would be set high so the noise would not disturb other people in the room. When Station Y received the signal from Station X, an alarm would sound and the squelch would break and all the equipment for receiving messages would turn on. This was used during the hey-day of teletype. I loved the chatter of teletype machines going 60 or 100 words per minute.
Kappykaplan, you are right in your definition. And so is Jackdaw on the use of DSC on VHF channel 70.
I keep getting multiple alerts on 16 with no info. Basically, i quit listening on 16.....to many trips to the radio to silence them...