Originally Posted by
HEATHROW DIRECTOR
Way back in the Golden Days a Heathrow controller bet a Viscount pilot coming in via Watford that he couldn't land on 28R without receiving the ILS Middle Marker (which was about 1.5 miles out I recall). The pilot accepted the challenge..... and the controller had to get his wallet out later!
From my notes (unread for the last xx years!), the MM is at about 1.5km from the threshold, not 1.5NM. That would make it at about the Cat 1 DH of about 200ft or so, which makes sense. I suspect on that basis that the controller was conned to open his wallet
I remember being told that the aural sounds of the markers reflected your heart beat, ie OM = dash...dash...dash (slow), MM= dot . dash..dot..dash (pretty quick), IM = dot,dot.dot.dot (bl00dy quick), ie the cclser to the threshold without visual reference the faster it became.
