The measurement of local time is based on...

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Question 1 of 2066636ee928f7522a1c519bcf

The measurement of local time is based on the passage of the Sun over the __________.

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Question 1 of 20

66636ee928f7522a1c519bcf

The measurement of local time is based on the passage of the Sun over the __________.

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🔍 Key Concepts

• local time vs. Greenwich Mean Time (GMT) – which one is based on the observer’s position? • What a meridian is – a line of longitude passing through a specific location on Earth • Difference between upper transit (Sun on your meridian at local noon) and lower transit (Sun on the opposite side of Earth)

💭 Think About

• Ask yourself: when we say "local noon," are we talking about the Sun being directly over your meridian or over the Greenwich meridian? • Think about whether the daily time scale we use is tied to when the Sun crosses above your horizon (upper branch) or when it is under your feet (lower branch). • Which crossing of a meridian by the Sun would be observable and practical for determining time on board a vessel?

✅ Before You Answer

• Confirm which meridian is used for local time—the observer’s meridian or the Greenwich meridian. • Decide whether upper transit (meridian passage at noon) or lower transit (midnight) is the standard reference for measuring local time. • Eliminate choices that combine Greenwich with local time, and focus on which branch (upper or lower) makes sense for a practical time measurement.

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Question 1 of 2066636ee928f7522a1c519bcf

The measurement of local time is based on the passage of the Sun over the __________.

Back

Question 1 of 20

66636ee928f7522a1c519bcf

The measurement of local time is based on the passage of the Sun over the __________.

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