The Light List indicates that a light has a...

Question 1 of 2707066636ee928f7522a1c519a92

The Light List indicates that a light has a nominal range of 18 miles and is 38 feet high. If the visibility is 6 miles and your height of eye is 15 feet, at which distance will you sight the light?

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Question 1 of 27070

The Light List indicates that a light has a nominal range of 18 miles and is 38 feet high. If the visibility is 6 miles and your height of eye is 15 feet, at which distance will you sight the light?

🔍 Key Concepts

• Luminous range vs. geographic range of a light • How meteorological visibility limits what you can see • Using height of eye and light height to find the distance to the horizon for each

💭 Think About

• Think about which is smaller at any given time: the light’s nominal range, the geographic range based on heights, or the visibility in miles • Ask yourself: Do you first find how far away the curvature of the earth lets you see the light, then compare that to the effect of the 6‑mile visibility? • Consider whether poor visibility can reduce the usable range of a light that is otherwise visible much farther away.

✅ Before You Answer

• Be sure you know the difference between nominal range (from the Light List) and geographic range (from heights) • Confirm you apply the correct distance-to-horizon formula or table for both the light’s height and your height of eye, then add them • After computing geographic range, compare it carefully with the 6‑mile meteorological visibility and the 18‑mile nominal range before choosing.