Traffic. As in australia all of Canadian class G is overlaid with controlled airspace operated by ATC on allocated frequencies.
I Canada there is not a requirement for non controlled aircraft to monitor and announce on these frequencies.
This saves money because in low traffic density airspace they do not have to stratify the airspace so costs can be reduced.
Our system is not better or safer. Canada has low level E at certain non tower airports just like the USA.
We don’t as yet because it’s claimed we will need more controllers and consoles resulting in extra costs.
It appears our existing controllers are already at the max!
Last edited by Dick Smith; 27th Dec 2017 at 01:15.