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12th Grade Sextant Quizzes, Questions & Answers

12th Grade

Your Grade is 12

Top Trending Sextant Quizzes

The Moon Clock: The Lunar Distance Method Explained

If your mechanical watch breaks in the middle of the ocean, the moon becomes your backup chronometer. This high stakes method involves measuring the gap between the moon and a fixed star to determine the exact time back at...

Questions: 20 | Attempts: 11 | Last updated: Feb 25, 2026

Sample Question 1
What is the fundamental goal of the lunar distance method in celestial navigation?

To measure the distance from Earth to the Moon in kilometers

To determine Greenwich Mean Time (GMT) by treating the Moon as the hand of a cosmic clock

To predict the exact timing of lunar eclipses

To calculate the Moon's gravitational effect on tides

To map the craters on the lunar surface

Sample Question 2
Why is the Moon specifically used as the "hour hand" for this navigation technique?

It is the brightest object in the night sky

It orbits the Earth in a perfect circle

It moves relatively quickly (about 0.5 degrees per hour) across the background stars

It always stays at the same altitude

It is visible during every day of the month

Sample Question 3
The lunar distance method explained in 18th-century manuals was the primary way to find longitude before portable chronometers became affordable.

True

False

12th Grade Sextant Quizzes, Questions & Answers

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