VHF channels previously used by marine operators for ship-to-shore communication are now being used by Sea Tow for automated radio checks. In reference to an earlier thread, marine operators are gone. See link below for information about the channel to use for your area. Apparently, this was done principally to reduce traffic on Ch. 16 by radio-checkers. Has anybody tried it and did it work?
http://www.seatow.com/boating_safety/ARC.asp
http://www.seatow.com/boating_safety/ARC.asp