Tinstaafl,
I'd still like to know what's behind the 'qtr/half/3qtr only' style of navigation? Is it a JAR requirement to only use that method? Or is the school's JAR approval based on whatever the schools syllabus specifies- and it only mentions that one?
I've just had a phone-call from my old PPL instructor, and I mentioned this to him. He told me that when he did his PPL he was taught this method. He only learnt the 6-minute-mark method when he did his CPL - but he thought it enough of an improvement over the 1/2-way-marks that this is the method which he taught to all his PPL students.
It seems, from that, that it's not the CAA who specify the 1/2-way marks - so it must be EFT. Although he has a CAA CPL, so it's also possible that it's all changed under JAR. Not a definitive answer, I know.
FFF
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