A vessel "restricted in her ability to maneuver" is defined as which of the following?

A vessel that is "restricted in her ability to maneuver" refers specifically to a situation where the vessel is unable to safely navigate or change its course because of the nature of its work. This could include vessels engaged in operations such as underwater construction, salvage operations, or other tasks that require them to have limited mobility due to their operational needs.

For example, if a tugboat is assisting in docking, it may not be able to maneuver freely while performing the task at hand. Understanding this definition is crucial for maintaining safe navigation and ensuring that other vessels take the necessary precautions when encountering such a vessel. This definition is established to help uphold maritime safety standards and to give clear guidance on how other vessels should interact with those that are limited in their maneuverability as a result of their operational characteristics.

In contrast, the other options refer to different scenarios that may affect a vessel's capability to navigate, but they do not fall under the specific definition of being restricted due to the nature of the work. This distinction is key in maritime regulations and helps to clarify how vessels are categorized based on their operational circumstances.