What is the main purpose of the rules regarding lights on vessels?

The main purpose of the rules regarding lights on vessels is to ensure vessels are visible to each other. This visibility is crucial to prevent collisions and enhance maritime safety. According to the International Regulations for Preventing Collisions at Sea (COLREGs), specific lighting configurations indicate the type, size, and direction of a vessel’s movement. By adhering to these regulations, vessels can communicate their status to others navigating in the vicinity, allowing for safer passage, especially during periods of low visibility, such as nighttime or in poor weather conditions.

The rules around lights serve a functional role rather than an aesthetic one, meaning that they are not designed for decoration or visual appeal. While compliance with international treaties is an essential aspect of maritime operations, it directly relates to safety and avoiding maritime accidents. Operational speed, while important for the efficiency of a vessel, is not a primary concern addressed by these lighting regulations.