What is NOT a vessel "restricted in her ability to maneuver"?

A vessel is considered "restricted in her ability to maneuver" when she is unable to deviate from her course or to safely carry out normal maneuvers due to limitations in her capabilities or operational constraints.

The correct choice identifies a deep-draft vessel that can only navigate in a dredged channel. While such a vessel may face navigational challenges due to its deep draft, this limitation does not fit the definition of being "restricted in her ability to maneuver." The vessel can still navigate, albeit restricted to specific areas or channels that accommodate its draft, maintaining the ability to actively maneuver within those confines.

Conversely, vessels engaged in rescue operations, those under tow, and vessels engaged in fishing operations often have limitations that impede their ability to maneuver. For instance, a vessel performing rescue operations may need to focus on its task and may not be able to change course unexpectedly. A vessel under tow is inherently limited in its navigation due to the attachment and the need to coordinate movements with the towing vessel. Similarly, fishing vessels, particularly those with gear in the water, can have restricted maneuverability due to the operational requirements of their activities.

This context clarifies why the other options describe vessels with restricted maneuverability, highlighting that the deep-draft vessel