Oz, OK you win - the answer is yes and no !
But what could the reason be for the UK , Canada and the USA to have a very small amount of airspace ( as small as 3nm/2000'agl) at their non radar towers?
I wonder- could it be that years of experiece has shown that this is the safest way to go?
No , these countries wouldn't have a clue compared to our pilots that risk Broome and Avalon!
I will email the FAA and get them to change to 30nm radius like Broome!