5 kms? Pah!. On the NBS course in 1970 I missed a dam in North Yorkshire and "hit" another 9 miles (15 km) away. Still, it clinched my posting to a very happy 6 years on Victor tankers,instead of Vulcan bombers
ORAC That reminds me of when they set up this 100 mph train smash to prove the integrity of nuclear fuel flasks in the event of a derailment. As I recall the anti-nuclear brigade who were protesting about the movement of this material still weren't satisfied and said that because the flask was angled across the track it somehow invalidated the experiment.