"Bravo" channels?

[NS9710]

Listening to the maritime channel plan I heard the operator mention Channel 21 Bravo, or 82(?) Bravo. This is the first time in my scanning of the Maritime channels I have heard of any "Bravo" channels used, Anyone have anymore information?

Niagara Falls/Buffalo Area 6PM

 

[GTR8000]

VHF Marine Radio Channels

www.boat-ed.com

Marine Channels (Canada) Scanner Frequencies and Radio Frequency Reference

Scanner Frequencies and Radio Frequency Reference for Marine Channels (Canada)

www.radioreference.com

 

[nd5y]

Some of the marine VHF channels are duplex channels that consist of two frequencies, ship transmit on one and coast transmit on the other.

In some countries some of the duplex channels are split up into one or two simplex channels. Those are labled A and B or prefixed with 10 or 20.

Canada has some B channels but I don't think those are used in the US.

Marine VHF Band Plans - The RadioReference Wiki

wiki.radioreference.com

 

[GTR8000]

Canada has some B channels but I don't think those are used in the US.

Note the OP's location...

 

[trentbob]

Note the OP's location...

... right on the Canadian border.

 

[lamarrsy]

It’s a bit obscur for us scanner listeners, but I recently discovered that there are slight differences in VHF marine frequencies.
That’s why marine VHF radios have a selector for US / Canada / International bandplan : Canadian channels tend to differ a bit from the US config, and same for US / Canadian vessels that would travel abroad : they’d switch their radios to the Intl bandplan, which differs a bit from our two countries.

 

[hill]

Must be Canadian channels.

B channels are mostly semi duplex with vessels transmitting in one frequency and the Coast station transmitting on another frequency.

B channels are also used in Canada to broadcast weather information like.our VHF weather frequencies.

 

[nd5y]

B channels are mostly semi duplex with vessels transmitting in one frequency and the Coast station transmitting on another frequency.

No. A and B are separate simplex channels as in the following example.
Ch 21 (International) 161.65 RX/157.05 TX duplex
Ch 21A (US) 157.05 simplex
Ch 21B (Canada) 161.65 simplex (except it's used for weather broadcasts in Canada)

 

[n4jri]

The "B" side of what would be a semi-duplex channel is 4.6 MHz above whatever freq we'd normally listen to as the "A" channel.
We don't LEGALLY use "B" channels in the US AFAIK--except for using 161.975 and 162.025 to broadcast AIS data, but I'm sure that there are ways to hack a marine radio for the ones that are legal elsewhere. The range would be 160.600 to 162.025, which we use for railroads and remote broadcast. The state of Virginia uses the 'B' side of old marine telephone phone channels as control channels for its STARS system, starting about 100 miles inland. I think those are leased. Range is roughly 161.825-162.000. (am pretty sure that they DON'T use 161.975)
I check the 'B' channels pretty regularly when in the port of Hampton Roads, but rarely hear anything--and then it's almost always a rustbucket bulker that doesn't have UHF radios for onboard use. I hear those European low-power 446 MHz freqs more often than any marine B channels.

73/Allen (N4JRI)

 

[ecps92]

The "B" side of what would be a semi-duplex channel is 4.6 MHz above whatever freq we'd normally listen to as the "A" channel.
We don't LEGALLY use "B" channels in the US AFAIK--except for using 161.975 and 162.025 to broadcast AIS data, but I'm sure that there are ways to hack a marine radio for the ones that are legal elsewhere. The range would be 160.600 to 162.025, which we use for railroads and remote broadcast. The state of Virginia uses the 'B' side of old marine telephone phone channels as control channels for its STARS system, starting about 100 miles inland. I think those are leased. Range is roughly 161.825-162.000. (am pretty sure that they DON'T use 161.975)
I check the 'B' channels pretty regularly when in the port of Hampton Roads, but rarely hear anything--and then it's almost always a rustbucket bulker that doesn't have UHF radios for onboard use. I hear those European low-power 446 MHz freqs more often than any marine B channels.

73/Allen (N4JRI)

in some US Area's Ch-20 is licensed as duplex and even as a Repeater

 

[n4jri]

in some US Area's Ch-20 is licensed as duplex and even as a Repeater

It either is or was licensed in Hampton Roads to the Maritime Association, but I never heard anything. Maybe something on 20A once in a blue moon. Given how crowded the deer hunting population is on the A channels, I'm surprised that I haven't heard any on the B channels <g>

 

[Railbender]

Listening to the maritime channel plan I heard the operator mention Channel 21 Bravo, or 82(?) Bravo. This is the first time in my scanning of the Maritime channels I have heard of any "Bravo" channels used, Anyone have anymore information?

Niagara Falls/Buffalo Area 6PM

Those are Canadian marine WX, If you had monitored them you would see that.

 

[dlwtrunked]

Listening to the maritime channel plan I heard the operator mention Channel 21 Bravo, or 82(?) Bravo. This is the first time in my scanning of the Maritime channels I have heard of any "Bravo" channels used, Anyone have anymore information?

Niagara Falls/Buffalo Area 6PM

Note that what I have seen here has mentioned the ongoing change of channel numbers and ignores it. That change eliminates the "Alfa" labeling. (Most web sites have not caught up and use is slow in changing). See

International VHF Marine Radio Channels and Frequencies | Navigation Center