Originally Posted by s/v Jedi
It is called ATIS... Google
it for more info
More info on ATIS is here: Automatic Transmitter Identification System (marine) - Wikipedia, the free encyclopedia
A compromise to transmitting identifying data at the end of every transmission
on the same frequency - forcing everyone to listen to a one-third second audible data burst - is to transmit a DSC
Position Report on channel 70 (the normal channel set aside for DSC) only when the user transmits on channel 16 (and maybe 9). By limiting the position reports to transmissions originated on the hailing and distress
frequency, the traffic load on channel 70 would be very low.
All of the DSC-capable radios have the ability to transmit DSC
position reports. I suspect few people know how to use the feature. Automatically sending a position report is only a software
change for DSC-enabled radios, and it wouldn't require a full blown standards adoption. There's nothing in the regs that prevents anyone from sending a (legitimate) position report at any time on DSC channel 70. I'm surprised the radio
manufacturers don't offer that feature now by default. The position report transmission
could be limited to something like one transmission every 10 minutes, and by doing so, the user would only experience the cut-off of receive capability of one-third second (while the transmission was going out) once every 10 minutes.
My chart plotter, like many others, will automatically plot the position of anyone sending a DSC position report. My VHF radio
also stores the position, and allows me to set it as a waypoint for navigation
. This would also be helpful to nearby vessels wishing to render assistance in much the same way that AIS
gives positional guidance. But with this feature, an AIS
transponder or a chart plotter wouldn't be needed to receive and use a position broadcast by a vessel in distress
. You'd only need a modestly expensive DSC-capable transceiver.