What is the maximum vessel length that allows for lights installation exemption?

The maximum vessel length that allows for an exemption from the installation of specific lights is indeed less than 20 meters. This distinction is rooted in the regulations set forth in the COLREGs, which recognize that smaller vessels, typically under 20 meters in length, may operate with more simplified lighting requirements.

Vessels of this size are often used in local waters and by less experienced operators who may find the complexities of comprehensive lighting requirements challenging. The regulations are designed to make navigation safer while accommodating the operational needs of smaller craft. Therefore, vessels under 20 meters benefit from this practical exemption, which allows them to comply with safety regulations while keeping compliance feasible.

In contrast, vessels exceeding this length are subject to more stringent lighting requirements, ensuring better visibility and safety on the water. This is because larger vessels present a greater risk due to their size and operational capabilities. Thus, the rationale behind the exemption aligns with promoting safety within the constraints of vessel operation and design.