As I understood it, he said a 1 minute error on that leg length equated to a 20 mile error at Berlin.
Only if he never took another fix, which would be an unlikely scenario with Gee available and pinpoints on coast in even at night!
Beags: acknowledged fact! Anyway, I thought the definition of an oxymoron was a flying instructor in Oxfordshire! Yah, Boo, Sucks to you!!
Foldie