Cows
<<If the aircraft departed over Co. Antrim at less than 500ft (AGL or AMSL) there is no way it could have maintained a constant track.>>
It was certainly possible to have maintained a constant track on 027 (from V813 to waypoint A) over the Antrim hills as the cloudbase was sufficiently high in the region - what on earth are you saying here?.
The highest ground that they would have had to cross was about 1000ft in the vicinity of Sleamish (1400 ish), and the track was along the edge of the coastal hills allowing them to have been very low around Carnlough without having deviated from that track.
The ATC fix was 500 metres east of that track (close enough for their purposes) but it should be noted that the 027 was from the radar site - not the Belfast VOR site - so that fix should be taken as 7 nmiles from the radar on 027 mag from that radar.
Anything but the obvious.
