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

The option indicating that ignoring the overtaken vessel is not permitted highlights a key principle in the COLREGs, which emphasizes the responsibilities of vessels to ensure safe navigation and prevent collisions. When a vessel is overtaking another, the overtaking vessel is required to navigate in a manner that respects the action and position of the overtaken vessel. Ignoring the overtaken vessel is inappropriate because it disregards the duty of care that is necessary to avoid potential collisions. The overtaking vessel must maintain awareness of the overtaken vessel's movements and intentions while ensuring that their own movements do not pose risks to it.

In contrast, changing course and speed or ongoing alteration of bearing may be legitimate maneuvers to ensure safe passage and to maintain safe distances. These actions can help the overtaking vessel maintain the required distance, signaling awareness and intention to maneuver safely. Additionally, passing closely by the overtaken vessel can still be permissible under certain conditions, provided that appropriate caution and navigational rules are followed to prevent close quarters situations that may lead to collisions. The emphasis on interaction with the overtaken vessel outlines the importance of vigilance and the responsibility to communicate intentions in navigation.