EASA NAV(A)intermediate
Match each geographical and navigational term to its defining property: 1. Great circle 2. Small circle 3. Meridian 4. Parallel of latitude A. A circle formed on a sphere by a plane that passes through the centre of the Earth B. A circle formed on a sphere by a plane that does not pass through the centre of the Earth C. A line connecting the geographic North and South poles that marks constant longitude D. A line running east-west that lies parallel to the plane of the equator
Answer
1-A, 2-B, 3-C, 4-D
Explanation
These definitions distinguish the principal geometric features used on navigation charts. The equator is a great circle; most other parallels of latitude are small circles. Meridians are semicircles connecting the poles, and opposite meridians together form a great circle. **Key takeaway:** Whether a circle passes through Earth's centre determines whether it is great or small.\n\n**Glossary:** **Parallel**: a latitude circle; **small circle**: a circle that does not divide the globe into equal halves.
Related Questions
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- What is the distance between 150°E and 151°E along the equator?(basic)
- What is the difference in latitude between A (12°53′30″N) and B (07°34′30″S)?(basic)
- At approximately which latitudes are the Earth's two polar circles—the Arctic Circle and the Antarctic Circle—located?(basic)
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