Hi Robin. A Herc could be 149 feet below the level of your lounge and still be 251ft MSD (Minimum Separation Distance) so totally legal (although I am presuming the valley floor to be at sea level). Hercs are big and often look much lower than they are in reality. Flying in the valleys can also give the impression that aircraft are lower than they actually are.
Hope you enjoy the flybys !!
Last edited by Stretchwell; 28th Jun 2007 at 21:32.