Clearing out the loft today I found an old Nav Planning Template I'd scrounged back in the 70's. I Never got to use it at 360 Kts let alone 540 Kts ... in fact I just wanted a "neat" way of drawing Heading & Height Boxes for 90 Kts on the Chipmunk !
I guess these days the need to mark-up fablon covered Topo Maps with chinagraph pencil has long been replaced by PC based planning tools
Just covering the bl**dy map, wrinkle free, in fablon was an art in it's self !
That said ... outside the standard Douglas Protractor, Perspex Nav Rule and the Dalton Wiz Wheel ... did anyone use other official/unofficial nav planning tools pre the computer age ?
I did hear a "story" once of an F4 Nav who could plot with a Mars Bar and chinagraph on his knee boards !
Might make an interesting thread ...
Best ...
Coff.