What does it mean for a vessel to be considered "underway" under the Rules of the Road?

When a vessel is considered "underway" under the Rules of the Road, it means the vessel is not at anchor, made fast to the shore, or aground; instead, it is in motion. A vessel that is drifting with the engine off still qualifies as being underway because it is not stationary and it is free from restraint.

In maritime terminology, "underway" captures the essence of a vessel being in motion, even if it is not actively being propelled by its engines. The distinction is important for navigation and right-of-way regulations. Being underway means that other vessels must give way according to specific navigation rules. This defines how vessels interact with one another on the water, ensuring safety and proper navigation.

The other situations, such as being at anchor or aground, do not fulfill the criteria for a vessel to be categorized as underway, as they involve being stationary or secured to a fixed object without independent movement.