When Merging Target Procedures are in effect, when are you authorized to vector an aircraft?

The correct response is that you are authorized to vector an aircraft only when the pilot requests it. This procedure is in place to ensure clear communication and coordination between air traffic control and the flight crew. When pilots are given the opportunity to request vectors, they can provide specific needs based on their situational awareness, including current flight conditions, navigational preferences, and operational requirements.

Effective communication enhances safety by allowing pilots to make informed decisions while flying. This approach aligns with standard operating procedures in aviation, which prioritize the role of the pilot in command and maintain mutual situational awareness between the controller and the pilot.

The other options may imply a level of flexibility in vectoring that could compromise safety or operational integrity by not placing the request process in the hands of the pilot, who is ultimately responsible for the safe operation of the aircraft.