Great-circle navigation

High school (ages 12+)
Geography

Name:

Date:

Step 1 · Read the article

Open the article and read it at the level above. Then answer the questions below in your own words.

https://smallwhale.org/articles/great-circle-navigation

Write what each word means, using the article.

Do not copy the article. Write two things you learned, the way you would explain them to a friend.

Answers below are taken from the article’s stored facts, so they match what the student read.

1. What is the application in aviation?Minimizes flight distance, reduces fuel consumption, and optimizes flight time
2. What is the application in maritime?Crucial for efficient fuel management and timely cargo delivery across oceans
3. What is a great circle?A great circle is a circle that cuts the Earth’s surface in half, like the equator or a line of longitude. It is made by a plane that goes through the center of the Earth.
4. Why is a great-circle route the shortest path on Earth?Because on a sphere, the shortest distance between two points is along the arc of a great circle. This arc is called a geodesic.

Geodesic: The shortest possible path between two points on a curved surface, like a sphere.
Spherical Trigonometry: A branch of mathematics dealing with triangles on the surface of a sphere.
Mercator Projection: A map projection that represents lines of constant compass bearing as straight lines.
Rhumb Line (Loxodrome): A line on the Earth's surface that crosses all meridians at the same angle.