NAT/MNPSA
To clarify the question.
If one is flying within the vertical airspace ie. FL285 to FL420 lets say FL360 and the Random Track flown is North of TRACKA or South of TRACKZ and no part of the planned track is common to any NAT Track. Does one still need to offset 15nm before descending in case of an emergency.
Secondly to confirm If a Random Track is planned again without any part of the track being common to a NAT Track. This track is chosen normally by the operator and is not a track selected by ATC which is a system of Random Tracks.
These questions are specific and are not really answered in the documents.
Thanks
C152R