What should pilots do when transitioning from VNAV guidance to manual control?

When transitioning from VNAV guidance to manual control, ensuring clear communication with Air Traffic Control (ATC) is crucial. This step is vital for several reasons. First, it informs ATC of the aircraft's change in navigation mode, allowing them to provide any necessary assistance or instructions tailored to the new flight situation. Additionally, clear communication helps maintain safety by providing situational awareness to both the pilot and ATC, which is particularly important in busy airspace or during complex operations.

Maintaining this communication also serves to confirm that both the aircraft and ATC are aligned in their understanding of the aircraft's intentions, which is essential for safe maneuvering during the transition phase. Proper communication can help mitigate misunderstandings and ensure that the aircraft receives any required traffic advisories or altitude instructions as the pilot takes manual control.