Sorry guys, as an ex-mil aviator I couldn't help chipping in. I remember doing 'short field length landings' in Nimrods to practise landing on the PSP surface at Stanley following the Falklands campaign. These were again practised in the mid-late 80s when Kinloss was on 'Bolthole' at Lossiemouth. Reversers were selected and accelerated at approximately 50ft to ensure a 'firm' touchdown with a stopping capability of approximately 1200ft. Two of the occasions were so firm it cost two full sets of mainwheels and a couple of days of heavy landing checks!