What is the meaning of the CFA Frequencies on VTA Charts

[harry_fine]

Becoming current after many years off.

Last I saw a VTA chart, there was no such thing as a Common Frequency Area outside the terminal area. Yet on the back of the Toronto VTA charts, there are references to these frequencies and areas. They appear to indicate that outside the TRSA, whether or not you are entering the terminal area, you should be on these frequencies unless transiting another control zone (Hamilton for instance).

Where did these come from, how long have they been in use, and are they actually mandatory? Is the airspace just so busy they added these despite the fact it's not in Class C airspace?

Thank you

[Rookie50]

Harry,

They are new -- perhaps 4- 5 years now?

They are not mandatory, but work in principle like 126.70 as advisory frequencies. If not with Toronto terminal monitering is wise. (Actually even when with terminal)

They were created partially due to the heavy flight training in those areas, and schools now tend to announce on those instead of 126.70 during their air work

Edit -- in those areas you may hear students transmitting on them, and others on 126.70. Not a bad idea to monitor both. (although I've often forgotten monitor the new ones)

[harry_fine]

Thanks so much. Makes sense.

[photofly]

Because of frequency congestion on 126.7 in 2010 (2009?) the change was to assign distinct frequencies for FSS and pilot position announcements. Three frequencies were assigned for position reports, one in each of three geographical sectors. The primary frequency to contact London Radio has also been reassigned to one of a small range of frequencies depending on location: for instance the Buttonville RCO is on 123.15MHz. 126.7MHz capability is retained by FSS as a broadcast-to-all-traffic service, although in practice it is still monitored by London FIC and an information service is provided on it.