EASA NAV(A)intermediate
48. A real distance of 220 NM measures 40.7 cm on a chart. What is the approximate chart scale?
Answer
1:1,000,000
Explanation
Convert 220 NM to about 40,744,000 cm. Dividing by the chart distance of 40.7 cm gives approximately 1,000,000. **Key takeaway:** Scale is chart distance divided by corresponding ground distance in like units. **Glossary:** Chart scale: ratio of map distance to ground distance.
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