A vessel laying pipeline while underway is classified as restricted in her ability to maneuver.

• A. Restricted In Her Ability To Maneuver
• B. Not Under Command
• C. Sailing Vessel
• D. Constrained By Her Draft

Answer: (A)

A vessel that is laying pipeline is performing a specialized operation that limits its ability to maneuver. Because the work requires maintaining a specific course and speed and cannot easily deviate to avoid other vessels, it fits the category of restricted in her ability to maneuver. This RAM designation signals to other mariners that, although the vessel must still follow the collision rules, it may not take abrupt action to avoid danger and other vessels should plan early and give way as needed.

This isn’t not under command, which is for vessels unable to maneuver at all, often due to an engine or steering failure. It isn’t constrained by her draft, which relates to depth and channel width limiting how far the vessel can deviate. It isn’t a sailing vessel, since it’s powered by machinery and performing work rather than relying on sails. So the best fit is restricted in her ability to maneuver.