On Tue, 17 Feb 2004 17:44:40 -0500, "Scott Downey"
wrote:
I was testing my radios by talking back an forth thru each channel. On
channels 24 thru 28 and 84 thru 87 the radios do not respond to each other.
Is this what you would expect ?

I notice these are public correspondance channels are the marine operators
no longer in business? Are these channels ever used anymore?
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Those channels are in "full duplex" mode which means that they
transmit and receive are on different frequencies. They were designed
to communicate with the old marine operator shore stations, not in
"ship-to-ship" mode.

Marine operators have become obsolete in most areas since cell phones
became widely available. I haven't heard one in years but it's
possible that they still exist in some places. Too bad in a way
because some of them had very high antennas and could be heard a long
way out. We could frequently communicate with the Camden, Maine
operator from over 50 miles offshore.