In areas across the country, Sea Tow is offering boaters a new way to conduct radio checks that doesn't require help from other boaters or watch standers. To use Sea Tow's free Automated Radio Check service, simply tune your VHF radio to the appropriate channel for your location and conduct a radio check as you typically would. Upon releasing your radio's microphone, the system will play an automated message and relay your transmission back to you, thereby letting you know that boaters can hear you loud and clear.
see
http://www.seatow.com/boating_safety/ARC.asp
see
http://www.seatow.com/boating_safety/ARC.asp