What does an aircraft typically receive when transitioning between NAVAIDs?

When an aircraft transitions between NAVAIDs (Navigational Aids), it typically receives a direct heading to the next fix or waypoint. This action is part of the standard navigational procedures that assist pilots in maintaining a precise course during their flight. By providing a direct heading, air traffic control helps streamline the aircraft's path, ensuring efficient routing and minimizing flight time. This is particularly important in busy airspace, where clear and direct navigation instructions can help maintain safe separation between aircraft and improve overall air traffic management.

The other options, while they might seem relevant in some contexts, do not align with the typical procedures involved in transitioning between NAVAIDs. For instance, receiving an updated flight plan or general weather information would not specifically pertain to the transition between navigational aids, and a clearance to switch frequencies usually does not encompass navigation instructions. The emphasis in this scenario lies on the direct navigation assistance provided to ensure that the aircraft remains on a safe and accurate route.