What lights are required for a seaplane during operation?

A seaplane in operation is required to display specific lights to ensure its visibility and compliance with the COLREGs (International Regulations for Preventing Collisions at Sea). The inclusion of masthead, stern, and sidelights on a seaplane serves various safety purposes.

Masthead lights provide a clear indication of the vessel's heading and are typically white lights positioned on the centerline of the aircraft. The stern light, also white, aids other vessels in determining where the seaplane is located in relation to the observing vessel. Sidelights consist of red and green lights that indicate the aircraft's port (left) and starboard (right) sides, respectively. These are crucial for nighttime operations, helping other vessels ascertain the position and direction of the seaplane.

This combination of lights ensures that the seaplane is clearly visible both during the day and night, contributing to the safe navigation of all vessels in the vicinity. The requirement for these lights aligns with standard maritime practices, thereby enhancing safety in crowded or busy waters.