When correcting the sextant altitude to...

Question 1 / 2066636ee928f7522a1c519430

Question 1 of 2066636ee928f7522a1c519430

When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.

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Question 1 of 20

66636ee928f7522a1c519430

When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.

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🔍 Key Concepts

• Sextant altitude corrections sequence: observed height (Hs) → apparent altitude (Ha) → true altitude (Ho) • Which corrections are applied first: index error and dip vs refraction, semidiameter, parallax • The difference between errors caused by the instrument/observer setup and errors caused by the light path or the body itself

💭 Think About

• Think about what the sextant physically measures: it uses the visible horizon and your eye height. What kind of error does that introduce? • Ask yourself: when going from sextant altitude to apparent altitude (not yet true altitude), which group of corrections are you applying, early in the process or later in the process? • Which option best matches the idea of correcting for the fact that your horizon is not at the same level as if your eye were right at sea level?

✅ Before You Answer

• Identify which choice relates to reference level of the horizon/observer, not the center of the Earth or the celestial body • Recall that refraction and semidiameter are usually applied after you’ve already found apparent altitude • Eliminate any choice that talks about the center of the Earth or center of the body, because those are part of later corrections toward true altitude, not apparent altitude

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Question 1 of 20

When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.

for inaccuracies in the reference level

the equivalent reading from the center of the Earth

the bending of the rays of light from the body

the equivalent reading at the center of the body

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Question 1 / 2066636ee928f7522a1c519430

Question 1 of 2066636ee928f7522a1c519430

When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.

Back

Question 1 of 20

66636ee928f7522a1c519430

When correcting the sextant altitude to apparent altitude you are correcting for inaccuracies in the reading and __________.

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