As an ATCO I have seen the results of the FMS.
I won`t bore you with details but, essentially, the aeroplane ended up where it should not have been. I realised what was happening and, as it was not busy I gently moved the conflicting traffic out of the way...just to see what the clearance buster would actually do.
Eventually I said Kes....XXX what is your position? What is your altitude ?.........What was your clearance?
Oh sorry London, the FMS got it wrong.
Reply: Who is flying this aeroplane.........you or the FMS ?
Dave
