How do the International Regulations for Preventing Collisions at Sea reduce ship collisions?

The International Regulations for Preventing Collisions at Sea (COLREGS) reduce ship collisions by establishing a standardized, international code of navigation that ensures vessels operate predictably when encountering one another.12

These regulations minimize risk through several key requirements:

• Navigation Procedures: The rules specify in detail how ships must navigate in relation to each other, including determining which vessel must take avoiding action.31
• Visual and Audible Signals: They mandate the use of specific lights (such as red to port and green to starboard) to help sailors judge a vessel's course and speed, as well as the use of sound signals to communicate in conditions like fog.341
• Standardization: By providing a uniform set of rules adopted by nearly all maritime nations, the regulations prevent the confusion that would arise from conflicting national laws.12

Adherence to these rules is critical; any infringement is accepted in maritime courts as prima facie evidence of liability in the event of a collision.1