Determine the approximate geographic...

Question 1 of 2707066636ee928f7522a1c519580

Determine the approximate geographic visibility of an object, with a height above the water of 85 feet (25.9 meters), for an observer with a height of eye of 60 feet (18.3 meters).

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Question 1 of 27070

Determine the approximate geographic visibility of an object, with a height above the water of 85 feet (25.9 meters), for an observer with a height of eye of 60 feet (18.3 meters).

🔍 Key Concepts

• Geographic range vs. luminous range – you are dealing only with line-of-sight based on heights • Formula for distance to the visible horizon as a function of height of eye (in feet or meters) • How to combine the observer’s range and the object’s range to get total geographic visibility

💭 Think About

• First, find the distance to the horizon for the observer’s eye height, then separately for the object’s height above water – how are these two distances used together? • Think about what units your distance formula expects: are you using feet or meters, and what constant goes with that? • After you compute, compare your total distance to the multiple-choice answers: which one is closest to your calculated value?

✅ Before You Answer

• Be sure you are using the correct constant and units in the horizon-distance formula (don’t mix feet with a meters-based constant) • Double‑check your square root step for each height separately before adding the two distances • Confirm that your final result is in nautical miles, then match it to the nearest answer choice