Chuffed to bits - I re-took my Navigation exam today and got 90%. Of the two I got wrong, even my examiner got one wrong, admitting that he needed to revise. The other was a silly mistake I will never repeat.
More about this tomorrow.
Thanks to Neill and Ben (but mostly Neill) for ground-schooling me ....and thanks to the BMAA members who advised me on other books to read for the re-test.