Where should a single masthead light be placed on a power-driven vessel?

A single masthead light on a power-driven vessel should be placed forward of amidships due to its specific purpose of signaling the vessel's presence to other vessels. The masthead light plays a crucial role in ensuring visibility and safety during navigation at night or in poor visibility conditions.

Positioning the light forward of amidships allows it to effectively illuminate the front of the vessel and provide an advantage in establishing the vessel's heading. This placement helps other vessels understand the direction the power-driven vessel is facing and assists in collision avoidance. According to the COLREGs, this arrangement is essential in distinguishing a sailing vessel's orientation, particularly when other vessels are navigating in proximity.

In contrast, other placements, such as near the deck or at the stern, would hinder its visibility to approaching vessels, thereby compromising safety on the water. The specific placement of a masthead light is an important aspect of maritime safety regulations, designed to facilitate safe navigation for all.