I was a little late to the GW1 party; I seem to recall the primary purpose of Apollo when I was on 'ercs was to leave rude messages for the next nav on mct/cpt sorties.
Never got the hang of that either.
I could play a good game of 'find the fish' though. Still remember my first pond crossing; not realising nav screen had gone off somewhere I proceded to change chains. Having (successfully) done so said screen returned to flight deck and instructed me to change back to the original chains and then to the new ones as he hadn't observed me doing it previously. Arse.