Why are low altitude sun sights not...

Question 1 / 2066636ee928f7522a1c519b22

Question 1 of 2066636ee928f7522a1c519b22

Why are low altitude sun sights not generally used?

Back

Question 1 of 20

66636ee928f7522a1c519b22

Why are low altitude sun sights not generally used?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

• Refraction of light at very low altitudes • How sextant accuracy changes at small angles (near the horizon) • What modern sight reduction tables typically cover for altitude ranges

💭 Think About

• When the observed body (like the sun) is very low, what happens to the light as it passes through more atmosphere? • Is the main concern optical instrument limitations, table limitations, or atmospheric effects? • Which option describes something that can be especially unusual or unreliable when the body is close to the horizon?

✅ Before You Answer

• Compare which options involve instrument limitations versus atmospheric effects. • Ask yourself which condition becomes significantly worse as the altitude approaches the horizon. • Consider what typical sight reduction tables (like HO 229/249) say about minimum usable altitude and why that limit exists.

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed

Question 1 of 20

Why are low altitude sun sights not generally used?

The glare on the horizon causes irradiation errors.

Errors due to unusual refraction may exist.

Modern sight reduction tables are not complete for low altitudes below 5°.

Sextants may have large errors at small angles of elevation.

Loading interactive features...

Question 1 / 2066636ee928f7522a1c519b22

Question 1 of 2066636ee928f7522a1c519b22

Why are low altitude sun sights not generally used?

Back

Question 1 of 20

66636ee928f7522a1c519b22

Why are low altitude sun sights not generally used?

No comments yet

Be the first to share your thoughts!

If the question has a related picture, it will appear here.

🔍 Key Concepts

💭 Think About

✅ Before You Answer

👋 Hi! I'm Genie, your AI study assistant. How can I help you with this question?

Quick actions

— No credit card needed