Where are the red and green navigation lights located on a vessel?

The red and green navigation lights on a vessel are positioned at the bow, which is the forward part of the boat. This placement is crucial because the red light indicates the port side (left side when facing forward), while the green light signifies the starboard side (right side when facing forward). This arrangement allows other vessels to easily determine the direction a boat is heading, which is essential for safe navigation at night or during reduced visibility conditions.

In contrast, the other locations for the lights mentioned—such as on the stern, on the hull, or on the mast—do not provide the same level of visibility and clarity regarding the vessel's orientation and movement relative to other boats. Positioning the lights at the bow ensures that they can be seen from the front, making it easier for approaching vessels to assess any potential risk of collision.