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

Question 1 of 2707066636ee928f7522a1c519a89

The Light List indicates that a light has a nominal range of 10 miles and is 11 feet high. If the visibility is 15 miles and your height of eye is 20 feet, at what approximate distance will you sight the light?

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Question 1 of 27070

🔍 Key Concepts

• Luminous (nominal) range vs. geographic range of a light • How to compute geographic range using heights of eye and light (distance to the horizon) • Limiting range: comparing nominal range and geographic range to see which one controls how far away you can actually see the light

💭 Think About

• First, think about what the 10‑mile nominal range actually represents and what visibility of 15 miles tells you about whether nominal range is your real limit here. • Next, recall the approximate formula or table method for distance to the horizon based on height in feet; you’ll need it once for the light and once for your eye. • After you find the geographic range for the light and your eye, compare that geographic range to the nominal range: which one is smaller, and how does that affect the maximum distance at which the light can be seen?

✅ Before You Answer

• Be sure you are using the correct horizon-distance formula or table for height in feet, and keep track of units in nautical miles. • Confirm whether visibility (15 miles) makes the 10‑mile nominal range more or less important in this problem. • Check that your final distance is consistent with the idea that the actual visible range is limited by the lesser of nominal range and geographic range.