Crikey.. its a lot lot easier to do a 1 in 60 in turbulence than using a protractor and ruler. 1 in 60's are very easy to do.
Once you've had a bit of practice, guessimating tracks off a map is pretty easy to within +-10 degrees, and is invaluable when planning diversions enroute. Once established on new track do a 1 in 60 1/2 way along to revise your track made good to plop you over your destination.
Bevan..