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6878
When planning a distance flight, true course measurements on a Sectional Aeronautical Chart should be made at a meridian near the midpoint of the course because the
| | A) angles formed by isogonic lines and lines of latitude vary from point to point. |
| | B) values of isogonic lines change from point to point. |
| * | C) angles formed by lines of longitude and the course line vary from point to point. |
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