It took 120 miles to descend and slow from M2 to M1, then another 100 or so for the rest of the descent. Dave is staying with me in a couple of weeks so I'll see if he can remember the exact distances.

The INS controller is the same as on BA 707s, VC10s and 747s and was, I believe, a Delco Carousel 4, with the works modified to be more accurate and cope with the higher GS of Concorde , up to 1200 knots or so. !! No embedded GPS in those days !

The sight of that machine still gives me a warm glow of sheer admiration for a fantastic technical achievement. ! To actually watch Concorde climbing, turning and accelerating to Mach 2 in DRY power (above 1.7) still amazes me. Nothing quite like it.

Regards,

David Gladwin.