| 摘要 |
A method and apparatus is provided for maintaining a dual watch on marine radio bands and more especially on the VHF radio band in which a stand-alone battery-powered receiver is tuned to one of the two dual watch frequencies, with the main transceiver being automatically tuned to the other of the dual watch frequencies, such that the main radio can monitor an emergency channel, such as channel 16, whereas the stand-alone battery-powered receive-only radio can be utilized to monitor any other channel, but most especially the new channel 9 calling channel. The system thus provides both a monitoring function for the emergency channel as well as a monitor for the new hailing channel.
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