What would be a primary reason for adjusting a vessel's course?

Adjusting a vessel's course to account for navigational errors is crucial for ensuring safe and accurate navigation. Navigational errors can occur due to a variety of factors, including environmental conditions such as wind and currents, inaccuracies in mechanical or electronic navigation instruments, or human error in chart reading or waypoint plotting. By correcting the vessel's course, the navigator ensures that the vessel will follow the intended route, avoid hazards, and reach the destination safely. This adjustment is vital for maintaining situational awareness and minimizing the risk of grounding or collision, thus ensuring the safety of the crew and the vessel itself.