What is the minimum spacing between lights on a vessel of 20 metres in length or more in the Great Lakes Basin?

For vessels that are 20 metres in length or more, the minimum spacing of lights is guided by regulations to ensure visibility and effective signaling, especially in busy maritime areas like the Great Lakes Basin. The requirement of a minimum spacing of not less than 1 metre is established to ensure that the lights are clearly distinguishable to other vessels and mark the position of the vessel effectively.

This spacing helps in reducing the likelihood of one light obscuring another, which could lead to confusion regarding the vessel's heading, movement, or status. Adequate separation aids in the clear identification of navigational lights, making it easier for other vessels to assess situations, navigate safely, and avoid potential collisions. By adhering to this standard, vessels enhance their visibility and achieve compliance with safety regulations, which is crucial in busy waterways.

Larger spacings or smaller spacings could jeopardize visibility and the intended signaling functions of the lights, hence why the specific requirement of 1 metre is set for vessels of this size.