The owner or Master of a towing vessel must evaluate whether the entire towline, or a part of it, is no longer serviceable. The towline should be removed from service in all cases EXCEPT _________.

Correct Answer: Option B — when the vessel is underway

Safety management systems require towlines to be inspected and replaced based on wear, age, or manufacturer recommendations. Removing a line from service while underway is generally impractical and unsafe; therefore, inspections and scheduled replacements must occur while the vessel is in port or during non-operational periods to ensure crew safety.