What does VHF Channel suffix "A" mean

[checkyourmirrors]

I see on a lot of marinas to call them on channels like "66A" and it is not clear to me if you can actually tune to a "sub-channel" A. It seems like this is just a formal representation on 66 for hear in the US and when calling these A channels, I should just use 66 for example.

Can someone clarify for me please since I haven't found anything on the practical usage for these A channels.

 

[Fl_Richard]

Re: What does VHF Channel suffix "A" mean

As I recall some channels transmit and recieve on two different frequency's even though the radio says a single channel is tuned. These are the "A" alpha channels.

22 is one of them.

 

[checkyourmirrors]

Re: What does VHF Channel suffix "A" mean

I saw that on the charts and does the radio automatically adjust, meaning I only need to set my Raymarine to "22" and it handles the rest?

 

[dan t.]

Re: What does VHF Channel suffix "A" mean

A or alpha is the USA setting,B or bravo is the international setting, 16 is the same on either,no the radio does not automaticaly adjust, it must be set to one or the other, if you dont know these things I sujest you take a VHF operators course

 

[jhebert]

Re: What does VHF Channel suffix "A" mean

I see on a lot of marinas to call them on channels like "66A" and it is not clear to me if you can actually tune to a "sub-channel" A. It seems like this is just a formal representation on 66 for hear in the US and when calling these A channels, I should just use 66 for example.

Can someone clarify for me please since I haven't found anything on the practical usage for these A channels.

The VHF Marine Band radio channel plan is given in

http://www.navcen.uscg.gov/marcomms/vhf.htm

The suffix "A" on a channel generally denotes the use of a channel which is allocated two frequencies for duplex operation but is being used as a simplex channel on one of the frequencies, usually the lower of the paired frequencies. Also see

http://www.csgnetwork.com/marinefreqtable.html

and

http://en.wikipedia.org/wiki/Marine_VHF_radio#Marine_VHF_Channels_and_Frequencies

 

[JeffTull]

"A" using the USA frequencies.. As example channel 22A transmits on 157.100Mhz & receives on 157.100Mhz But outside USA everybody uses Channel 22 standard meaning transmits on 157.100Mhz & receives on 161.725Mhz,,, so basically the "A" we here in US transmits & receives on same frequency..

 

[GA_Boater]

Always nice to get confirmation that the answers given almost 7 years ago are still valid. Please don't reply to old, inactive threads.
It's our preference in this this forum - To let sleeping threads sleep. Thanks.


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