from our experience operating out of ZRH, there are TWO requirements that need to be satisfied! first is the noise abatement and second is nav tracking. i believe for most 'modern' airplanes with high bypass engines, flown with the correct NADP, it would not be a problem to satisfy the first requirement. i believe, most operators' infringement (as ours) are with the nav tracking. when the ATIS reports a VMC condition (yes, UNIQUE monitors and keeps record of the ATIS!), they EXPECT the VMC track to be flown! the problem lies with the FMC as it is programmed to fly the IMC track, if other than LNAV is selected... a good chance a 'nicely-worded' letter (included is a pretty printout of your ACTUAL track versus the 'required' track
) from UNIQUE will follow
SR