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AFAIK Canada has been operating with 18 Aurora plus 3 Arcturus"
Nope. Arcturus is long gone. 18 was a long time ago. Someone needs to invest in a new Janes.
My point is, irrespective of how many toys they have, they are operating with a lot fewer crews( as a ratio to aircraft) than we ever did or indeed aspire to. Over a pint those in the know will tell you how many crews were at ISK in 2004 on 4 Sqdns sharing 12 jets.