Did my yearly dams run on the 15th (couldn't make the 16th) in memory. I believe and stand to be corrected that Howden Dam, the top one of Ladybower and Derwent Dams was the one they practised on rather than Ladybower itself. How they managed to get lined up in time is beyond belief. I tipped in doing half the speed they were doing and at a height that was at all times 500' from persons, structures and vessels your honour and literally seconds later I was over the lip of the dam.
My hat goes off to those guys who found the things in the middle of Germany in the dark while being shot at. I've no idea how they did it.