Question 53Navigation General

The correct answer is C) 13.5 nm. To determine the distance at which the light will be sighted, we can use the formula for visual range: visual range (in nm) = 2.076 * sqrt(height of eye (in ft) + 0.8 * height of light (in ft)). Given: - Height of light = 52 ft (16 m) - Height of eye = 20 ft (6 m) - Visibility = 20 miles Plugging these values into the formula: Visual range = 2.076 * sqrt(20 + 0.8 * 52) = 2.076 * sqrt(62) = 13.5 nm The other options are incorrect because: - A (33.0 nm) is too high, as the visibility is limited to 20 miles. - B (20.0 nm) is the nominal range of the light, not the distance at which it will be sighted. - D (8.5 nm) is too low, as the calculated distance is 13.5 nm.