Every course change requires what key action?

When a course change occurs, it is crucial to plot a new Dead Reckoning (DR) position to ensure that the vessel maintains its intended track and effectively navigates toward its destination. Plotting a new DR involves calculating the vessel's current position and accounting for factors like speed, heading, and elapsed time since the last position fix. This critical action provides a consistent reference point for navigation and helps verify that the vessel remains on course, taking into consideration any environmental factors such as currents or winds.

While updating the navigation log, taking visual bearings, and communicating with the bridge team are all important actions in the navigation process, they do not directly relate to the immediate requirement resulting from a course change. Plotting a new DR ensures the crew has an updated understanding of the vessel's position on the navigation chart, which is essential for safe and effective maritime operations.