What action should a pilot take when converging with another airplane at the same altitude?

When converging with another airplane at the same altitude, the pilot should alter course to the right. This action is guided by the rules of the air, specifically the right-of-way rules, which stipulate that when two aircraft are on a collision course, the pilot of the aircraft that has the other on its right side is required to give way.

By altering to the right, the pilot ensures that both aircraft can pass safely without the risk of collision. This maneuver helps maintain a safe separation, as pilots may have limited visibility of one another, especially in busy airspace. It is crucial for pilots to be aware of these rules and consistently apply them to promote safety in the aviation environment.

Other options, such as altering course to the left or maintaining the current course, could potentially lead to a collision, as they do not follow the established protocols for avoiding conflict in the air. Similarly, climbing or descending immediately may not be safe or effective, as it could lead to uncertainty and confusion about each aircraft's intentions. Therefore, the correct and safest action is to alter course to the right when converging with another aircraft.