What action is NOT permitted to alleviate the duty of keeping clear for the overtaking vessel?

The choice stating that ignoring the overtaken vessel is not permitted is accurate because, under the COLREGs, maintaining a proper lookout and understanding the actions of other vessels is crucial for safe navigation. When a vessel is overtaking another, it has a responsibility to ensure it does so safely and without causing confusion or danger to the overtaken vessel. Ignoring the overtaken vessel completely disregards the obligations under COLREG Rule 9, which pertains to narrow channels and traffic separation schemes, and Rule 13, which deals with overtaking.

For instance, if an overtaking vessel were to ignore the overtaken vessel, it could lead to a dangerous situation such as a collision or close-quarters situation. This action could also convey a lack of communication or awareness, which is essential between vessels operating in close proximity to ensure mutual safety.

In contrast, actions such as changing course and speed, ongoing alteration of bearing, and even passing closely by the overtaken vessel may be acceptable as long as they are executed with caution and awareness of the situation. These actions can contribute to safe navigation as long as the overtaking vessel is communicating its intentions and ensuring that it allows the overtaken vessel to maintain its course and speed without interference.