A couple of years ago, I was helping a mate write a presentation for a speech he was to give. He produced his fablon covered map of the 5th Division of Sarawak, Borneo and the whole of Sabah and Brunei. Apart from the coastal area and some well known settlements or spot heights - Batu Lawi for example at 6600 feet amsl - the map was mostly blank.
Lines had been drawn on the map between many of the more frequently visited LZs. Along each line was written just three sets of figures. These recorded heading out, heading back and time to run at 90 knots: nothing else! With experience, the more enterprising marked on the fablon, things like visible river bends, prominent trees - there were millions of others - and anything else which would act as a route check. Perhaps the most important was the line of the Indonesian border.
No templates for plotting or for anything else - great fun when you're 21 but the excitement quickly wears thin when one accepts one's own mortality!!
Old Duffer