What should a pilot do if they do not receive a specific heading while radar vectored?

When a pilot does not receive a specific heading while being radar vectored, the most appropriate action is to request clarification from Air Traffic Control (ATC). This ensures that the pilot remains compliant with ATC instructions and maintains safe and effective navigation. By seeking clarification, the pilot can avoid potential misunderstandings that could lead to conflicts with other aircraft or deviations from the intended flight path. It is critical in aviation communication to ensure that instructions are clear and understood to maintain overall airspace safety.

Choosing to fly at a random heading, maintain the present heading, or switch to visual flight rules without guidance from ATC could lead to navigational errors, potential airspace violations, or increased risk of mid-air collisions. Therefore, requesting clarification from ATC is the correct and safest course of action.