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The method used is called

the 1:60 rule.

The rule is that if you have traveled a distance of 60 (this can be kilometers or
any unit) and you have gone 1 unit OFF Track, then you are 1° OFF Track.

If you are 5 units OFF Track, then you are 5° OFF Track, and so on.

If you have traveled a distance of 30 km and are 2 km north of the planned route,

then when you pass 60 km you will be twice 2 km = 4 km north of the route. So

you have a deviation of 4° from the planned route.

Let's look at an example:

You are on a flight after 20 NM and have gone 1 NM off course. How many

degrees are you OFF Track?

To calculate this, you need to find out how many NM you are OFF Track when

you pass 60 NM. A little mental math will mean that if it was 1 NM at 20 NM,

then it is 2 NM at 40 NM and 3 NM at 60 NM. So, after 60 NM you will be 3 NM

OFF Track. This corresponds to having flown 3° too far to the left.

Task:

You are at A.

Calculate how many degrees you need to

change course to the right to accurately hit B.

Solution:

o
You were 3 to the left of the planned course.

If you correct 3° degrees, you will fly parallel to the planned track.

When you start your correction, you are at 20 NM, and you are 1 NM OFF
track.

Flyveteori PPL(A)(UL)/LAPL Henning Andersen, Midtjysk Flyveskole© marts 2026 913