Dick
A couple of serious questions, based on a factual scenario.
When I look at the Sydney VNC, I see, for example, a green boundary around a big area that covers places like Bathurst, Orange, Cowra etc.
Within the area inside the green boundary are a couple of boxes, inside each of which is “ML CEN 118.5” in brown text and “ML CEN 135.25 MT CANOBALAS” in green text.
There’s also “A LL FL180” in blue text, and “E LL 8500” in brown text.
The legend for that chart says:
- the green boundary denotes an “FIA boundary”, and
- the numbers in the boxes are “FIS FREQUENC[IES]”
- the “A LL FL180” in blue denotes the lower level of Class A airspace is Flight Level 180, and
- the “E LL 8500” in brown text denote the level of Class E airspace is 8,500’.
In this scenario:
(1) Is 135.25 an “ATC frequency”?
(2) What aircraft on that frequency are under air traffic control?
As I say, serious questions.