Thanks for that westlakes.
Anyway, the point of my original questionis that some old marshalling signals have changed from what they were, and I'd like to know how many people who need to know them actually do.
There's little point in teaching 'official' signals if the majority don't recognise them, particularly in a civil differences course to military personnel.
If the resonse to my questions is a resounding 'huh?', I will take great pleasure in telling the CAA (fat lot of good that'll do). If, however it reveals that I'm living in the stone age, I'll be happy to amend the course content.
We do, of course, make reference to these two 'irregular' signals in the course but warn the candidates that many pilots won't know them.