Continuous marine broadcast
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A continuous marine broadcast, or CMB, is a marine
Saint Lawrence River
, and in English only on the Great Lakes, Arctic Coast and Pacific Coast.
The content of a CMB is a continuously-played back loop of marine weather information, provided by
text-to-speech system providing information from automated weather observation points. When necessary, an officer at an MCTS station can break into a CMB transmission and broadcast an urgent live message, such as a navigational warning or a distress relay message
.
CMBs are transmitted on several frequencies:
- 161.65 MHz (Channel 21B)
- 161.75 MHz (Channel 23B)
- 161.775 MHz (Channel 83B)
- 161.85 MHz (Channel 25B)
- 162 MHz (Channel 28B)
As well, on the Pacific coast, CMBs are transmitted on weather radio frequencies.
References
External links
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