Okay, this is a 3 part question.
How would you use the 1 in 60 rule, in the air - in flight?
When would you use the 10° drift line way and when would you use the 1 in 60 rule way?
With reference to nav. flights, am I right in thinking that when you go on nav. flights, you can go with your map, so you can literally just look down at your (maybe folded) map and see the 10° lines drawn in?
(I'm specifically mentioning the 10° lines because there may be some follow up questions on that)