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One of the questions for the EASA PPL(A) exam sounds like this:

What is the highest Minimum Grid Area Altitude between BERTA (point 1) and LJLJ (Ljubljana) along route A (yellow)?

And the following chart is provided:

enter image description here

The correct answer is 10700 ft, but I'm not sure why and how to detect this from this chart.

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1 Answer 1

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The Minimum Grid Area Altitude in each sector is depicted by the truncated numbers shown in the circle below. (There are several sectors shown in your photo, and the sector further west showing 97 is 9,700' for comparison. You can see a couple others at the very top of the image as well.)

enter image description here

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