NAVIGATION: Chart Scales
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Last updated 8:46 PM on 1/19/26
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4 Terms
1
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The scale of a chart is expressed as 15cm to 25nm. As a representative fraction, this is:
1:308833
2
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The scale of a chart is 10cm to 40nm. The scale as a representative fraction is:
1:741200
3
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An aircraft takes 33mins to cover a distance of 10cm on a chart, the scale of which is 1:1000000. The groundspeed is:
98kts
4
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An aircraft takes 45mins to cover a distance of 18cm on chart, the scale of which is 1:1000000. If the TAS is 120kts there is:
9kts tailwind
Note 
Flashcards (201)