11. If the visibility is 3 miles, at what range will you lose sight of Chesapeake Light?

Chesapeake Light will be lost at 8.3 nautical miles. This is determined by applying the luminous range method, which accounts for the light's nominal range and the given visibility of 3 nautical miles. The luminous range diagram indicates that under these conditions, the light's intensity will be too weak to be seen at a distance of 8.3 nautical miles.