"Jose"
Which would be redefining "circuits". So the flights don't "all involve
an equal number of takeoffs and landings".

How so? Is there an accumulation of aircraft in the sky (or on the
ground) when one does circuits? When I do them, the number of takeoffs
does in fact equal the number of landings. I just do more of them.

But every takeoff and landing isn't a separate flight.

m