I love these nostalgic threads.
I come from a boating family, although I grew up in Philly and I live back there now I did live up on Long Island New York and was a licensed Bayman better known as a Clam Digger all through college on the Great South Bay and was a mate on a fishing boat also.
I remember the 2 to 3 megahertz Marine use as a young kid. That was the only kind of radios in the boats at that time. Huge antennas and often noisy generators to Supply Power for the radios.
I wouldn't know for sure but I think those radios are still being used today as they get so much more distance than the VHF High systems that we're using now.
I certainly can remember making phone calls on channel 26 VHF in the seventies long before cell phones came about which pretty much changed the landscape. Of course Marine radiotelephone calls were out there for everybody to hear and you had to say over after each transmission.
Cell phones have certainly changed the landscape but if you are too far off shore, they don't work!
Thanks again guys for the Memories. LOL.