Because the actual center of some planets...

Question 1 / 2707066636ee928f7522a1c5190ce

Question 1 of 2707066636ee928f7522a1c5190ce

Because the actual center of some planets may differ from the observed center, the navigator applies a correction. Which correction is applied?

Back

Question 1 of 27070

Because the actual center of some planets may differ from the observed center, the navigator applies a correction. Which correction is applied?

🔍 Key Concepts

• Celestial navigation corrections applied to planets and the Moon • Difference between an object's geometric (true) center and what appears through a sextant when it is not fully illuminated • How phase and semidiameter are used when bodies are only partially lit

💭 Think About

• Think about when the center you "see" through the sextant is not the same as the true physical center of the planet—what causes that? • Which of these corrections is specifically associated with a body being partly illuminated, like a crescent or gibbous shape? • Which correction name would you normally associate with using the limb (edge) of the Sun or Moon rather than its center?

✅ Before You Answer

• Identify which correction is linked to partial illumination (crescent, gibbous) of a planet or the Moon • Separate in your mind: atmospheric effect vs. shape/illumination effect • Recall that semidiameter correction is tied to using a limb instead of the center—verify whether that’s what the question is describing

Question 1 of 27070

Because the actual center of some planets may differ from the observed center, the navigator applies a correction. Which correction is applied?

A phase correction

A refraction correction

An augmentation correction

A semidiameter correction

Question 1 / 2707066636ee928f7522a1c5190ce

Question 1 of 2707066636ee928f7522a1c5190ce

Because the actual center of some planets may differ from the observed center, the navigator applies a correction. Which correction is applied?

Back

Question 1 of 27070

Because the actual center of some planets may differ from the observed center, the navigator applies a correction. Which correction is applied?