At what approximate distance would you...

Question 1 / 2066636eea28f7522a1c51aec6

Question 1 of 2066636eea28f7522a1c51aec6

At what approximate distance would you expect Bartlett Reef Light to break the horizon, if the visibility is 27 nautical miles?

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Question 1 of 20

66636eea28f7522a1c51aec6

At what approximate distance would you expect Bartlett Reef Light to break the horizon, if the visibility is 27 nautical miles?

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🔍 Key Concepts

• Geographic range vs. luminous range of a light (which one depends on visibility, which one depends on height of eye and height of light) • Meaning of the phrase "break the horizon" in terms of the curvature of the Earth and distance to the horizon • The standard distance to horizon formula using height of light (and possibly height of eye) in nautical miles

💭 Think About

• Is the limiting factor in this problem the light’s brightness (visibility 27 nm) or the Earth’s curvature (distance to the horizon)? • When a question says a light will "break the horizon," are you dealing with luminous range or geographic range? • Which answer choice is in the typical range you get when you compute geographic range for a light of moderate height (tens of feet) on a standard training chart?

✅ Before You Answer

• Be sure you are using geographic range, not the 27 nm visibility, to pick the distance where the light first appears over the horizon. • Confirm how "break the horizon" is defined in your Bowditch/Light List reference so you choose the correct type of range. • Think about typical horizon distances (in nm) for lights 30–80 feet above sea level and eliminate choices that are clearly too small or too large for that range.

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Question 1 of 20

At what approximate distance would you expect Bartlett Reef Light to break the horizon, if the visibility is 27 nautical miles?

12.0 nm

5.9 nm

6.9 nm

12.8 nm

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Question 1 / 2066636eea28f7522a1c51aec6

Question 1 of 2066636eea28f7522a1c51aec6

At what approximate distance would you expect Bartlett Reef Light to break the horizon, if the visibility is 27 nautical miles?

Back

Question 1 of 20

66636eea28f7522a1c51aec6

At what approximate distance would you expect Bartlett Reef Light to break the horizon, if the visibility is 27 nautical miles?

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