Many thanks for you replies.
Pedal Stop, the link didn't work on that one, but the idea that people like the Coast guard might have good instructional tools is a good one. They can afford a graphic artist on staff!
MightyGem, this is the sort of thing but it may get a bit grainy if I blow it up to poster-on-the-white-board size. I'll try.
I'm no artist myself so I'm looking for those professionally drawn diagrams that you get in industry sometimes. Maybe training schools make so little money that we cannot afford them...
