The formulas covered
The e-book covers the following ATPL General Navigation calculations:
- Track angle error
- Closing angle
- Convergency (Earth)
- Convergency (Lambert’s projection)
- Conversion angle
- Departure
- Departure: Change with latitude (Mercator chart)
- Scale: Representative fraction
- Scale: Change with latitude (Mercator chart)
- Rate of descent
- Climb / Descent gradient
- Crosswind
- Drift
- Headwind
What’s inside?
1
A description of the formula to understand what is being calculated.

2
A formula in a friendly non-maths format that can be easily remembered.

3
An explanation with units to be used to get a correct result.

4
A sample question from the official EASA / UK CAA question bank.

5
A detailed step-by-step solution for the example given.

6
A cheat sheet with all formulas from the particular subject altogether.

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