An amplitude of the Sun in high latitudes...

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Question 1 of 2066636ee928f7522a1c51911c

An amplitude of the Sun in high latitudes __________.

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Question 1 of 20

66636ee928f7522a1c51911c

An amplitude of the Sun in high latitudes __________.

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🔍 Key Concepts

• Amplitude as used in navigation is the Sun’s bearing when its center is on the visible horizon • How refraction and dip of the horizon change when the Sun is above vs. exactly on the horizon • Why using the Sun’s center (not just a limb) on the visible horizon is important in high latitudes

💭 Think About

• Ask yourself: At what vertical position of the Sun does refraction change most rapidly, and how would that affect an amplitude observation? • Consider which choice describes a condition that is clearly and repeatably identifiable on the horizon, even in high latitudes where twilight is long. • Think about standard sight‑reduction practice: when we define sunrise/sunset times or amplitudes, do we conceptually use the Sun’s limb or its center for the geometric definition?

✅ Before You Answer

• Verify which option explicitly mentions the Sun’s center on the visible horizon, not just ‘above’ or a specific limb. • Check which condition would minimize errors from refraction, which is greatest when the Sun is just below or just breaking the horizon. • Confirm which description best matches the textbook definition of an amplitude observation used to find compass error.

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Question 1 of 2066636ee928f7522a1c51911c

An amplitude of the Sun in high latitudes __________.

Back

Question 1 of 20

66636ee928f7522a1c51911c

An amplitude of the Sun in high latitudes __________.

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