Which color navigation light is found on the port side of the vessel?

The color navigation light found on the port side of a vessel is red. This convention is part of the International Regulations for Preventing Collisions at Sea (COLREGs), which establish standard colors and positioning for navigation lights on vessels. The red light specifically indicates the left side or port side of the vessel when viewed from the perspective of someone facing forward. This is crucial for other vessels to determine the orientation and direction of travel of the vessel in question, especially at night or in reduced visibility conditions.

In terms of navigation safety, the port side red light helps other ship operators understand which side is the left side of the vessel, promoting safe passing protocols. Using standardized colors for navigation lights reduces the chances of misinterpretation and enhances safety at sea, particularly in crowded or narrow waterways.