What is the minimum range of a stern light on a vessel that is 50 meters or more?

The correct answer indicates that the minimum range of a stern light for a vessel measuring 50 meters or more is 3 miles. According to the COLREGs, vessels of this size must display a stern light that is visible for at least 3 nautical miles. This regulation ensures that other vessels can effectively see and identify the location of larger vessels in the dark or in low visibility conditions, enhancing overall safety at sea.

Larger vessels require lights with greater visibility range due to their size and potential impact on navigation. The stern light, specifically, plays a crucial role in indicating the vessel's direction to other operators. The requirement for a 3-mile minimum range is established in the COLREGs to help prevent collisions in busy maritime environments.

In contrast, other options would imply different visibility requirements which do not align with the specific regulations set for vessels in the 50-meter category, crucial for maintaining navigational safety standards.