ATC Rules of Thumb
G'day all you ATCO's,
Can you guys please advise a lowly pilot of any rules of thumb as to:
1) how you do Mach number separation? ie any rules about if 2 aircraft are stacked on top of each other, if you issue a difference of say M0.05 (so one at M0.8 and other at M0.75), it will take them X minutes to be Y Nms apart?
2) in this case would you consider using vectors to separate? or is speeed control preferred in the cruise?
3) any rules of thumb for separation in terms of in the approach phase, a difference of X knots between two aircraft starting together at the same point will mean that in Y minutes they will be Z Nms apart?
Just curious thats all.