Chart Navigation & Plotting · Chart Projections — Gnomonic Great Circle
A great-circle track is plotted as a straight line on which chart projection?
- AMercator
- BGnomonic✓ Correct
- CPolyconic
- DTransverse Mercator only
Explanation
On a gnomonic projection every great circle is a straight line, so navigators draw the great-circle route on a gnomonic chart, then transfer points to a Mercator chart (where it appears as a curve) to steer the rhumb-line legs between them.
Authority: Bowditch (Pub. No. 9), Chart Projections
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