Question 423Navigation General

The correct answer is A) 21.0 nm. The distance at which a light can be seen is determined by the height of the observer's eye and the height of the light above the water. Using the formula in the "Reprints from the LIGHT LISTS AND COAST PILOTS", with a height of eye of 40 feet (12.2 meters), the geographical distance at which Ambrose Light, NY, could be visible is approximately 21.0 nautical miles. The other options are incorrect because they do not accurately reflect the calculation based on the given height of eye. Option B (19.5 nm) and Option C (18.3 nm) are too short, while Option D (22.8 nm) is too long for the provided information.