COLREGs Scenarios Practice Test

In a traffic separation scheme, a vessel that is less than 20 metres in length, a sailing vessel, or a vessel engaged in fishing shall not impede the passage of a power-driven vessel following a traffic lane. This rule is there to keep the PDV’s path clear within the lane, reducing the risk of sudden maneuvers or close-quarters situations as ships move along designated routes. When the scenario specifies a vessel under 20 metres, that category is the one that must not block or hinder the PDV in the lane. The other options don’t fit the length condition described: SAMPLEa vessel over 40 metres isn’t singled out by this size-based prohibition, and while sailing and fishing vessels are covered by the rule, the prompt’s emphasis on being under 20 metres points to the under-20-metre vessel as the precise match.