In the days of the 'Car Boot' course we used to practice every fortnight on the actual nav plots used in the exam. And with all the theory exams based on a question bank, all you had to do was get hold of the old exam papers, learn the answers off parrot fashion and... Hey Presto, a yellow peril (with posh yellow laces!) was yours for the asking. Well, not quite - you still had to put up a reasonable performance in the practicals. (But we had seen them previously too. Only the callsigns had been changed.) Oh for the good old days
