What is the minimum visibility for manoeuvring light signals?

The minimum visibility required for manoeuvring light signals, as established in the International Regulations for Preventing Collisions at Sea (COLREGs), is 2 miles. This standard is in place to ensure that signals intended for navigation and communication between vessels can be seen clearly at a distance sufficient to allow for safe maneuvering and decision-making.

Visibility of 2 miles allows vessels to effectively respond to signals, reducing the risk of collisions in situations where vessels may be operating close to one another, especially in busy waterways or when maneuvering in congested areas. This distance also accounts for atmospheric conditions that may affect visibility, ensuring that signals remain effective for navigational safety.

Ensuring that the visibility is set at this distance balances the need for effective communication with the practical limitations of visibility due to weather, lighting, and other factors affecting maritime operations.