WIDN62,
Thnak you very much for your reply , msd is Minimum safe distance -yes? That was about the height i would have put the Herc at both stright line height wise and slant angle from hillside . Impressive to see and certainly brightens up the day. I was wary of saying I saw i a YYY type and it was only x hundred feet up because Pprune has a few people who unlike your helpful self seem to delight tn rubbsihing height estimates.
This was an especialy good view but this is not an uncommon event , most low level stuff iare Hercs , sometimes a An A400 but never a C17 even though they are regulars along the same route to the SW out of Brize , maybe theyare a bit too noisy at 250ft.
Thanks again and have a nice weekend