INTERNATIONAL ONLY Which is TRUE for a light used to signal passing intentions?

Correct Answer: Option D — The light must be an all-round white light only

Rule 34(b) permits the use of an optional light signal to supplement the mandatory whistle signals. This light must be an all-round white light, visible for at least five miles, and must be synchronized with the whistle blasts to provide a visual confirmation of the vessel's intended or actual maneuver.