What is the primary cause of index error of...

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Question 1 of 2066636ee928f7522a1c51998a

What is the primary cause of index error of a sextant?

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66636ee928f7522a1c51998a

What is the primary cause of index error of a sextant?

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🔍 Key Concepts

• Index error on a sextant is the error present when the sextant reads something other than 0° with the index arm set to 0 and the horizon viewed normally • The relationship between the horizon glass (or clear glass) and the index mirror is critical for proper alignment • Understand the difference between instrument error and human error in celestial observations

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• When you set the sextant to 0° and look at a distant horizon, what physical misalignment inside the instrument would make the direct and reflected images not line up? • Which pair of surfaces must be exactly parallel so that a 0° reading truly represents no angle between the two lines of sight? • Among the options, which describes a built-in alignment issue of the instrument itself, rather than a user mistake or a secondary effect?

✅ Before You Answer

• Verify which component is attached to the index arm and moves with it versus which is fixed to the frame • Check which choice describes a condition you can detect and correct when you "check the sextant for index error" before taking sights • Eliminate any options that are primarily about observer technique rather than internal optical alignment of the sextant

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Question 1 of 2066636ee928f7522a1c51998a

What is the primary cause of index error of a sextant?

Back

Question 1 of 20

66636ee928f7522a1c51998a

What is the primary cause of index error of a sextant?

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

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