What are the Pilot Flying responsibilities when the autopilot is not engaged?

The Pilot Flying (PF) has primary control during a flight, especially when the autopilot is not engaged. In this scenario, the PF must focus on maintaining control of the aircraft and ensuring it is operating safely and efficiently. This includes making navigation inputs, but the PF may coordinate with the Pilot Not Flying (PNF) to request assistance with tasks such as setting modes and targets.

The PNF plays a supportive role, managing specific operational duties while allowing the PF to concentrate on flying the aircraft. This teamwork is crucial for safety and efficiency, as it enables the PF to focus on the immediate control of the aircraft's trajectory without having to divert attention to other systems settings.

The other options do not fully capture the collaborative nature of the roles. While the PF definitely controls navigation inputs and may handle communications with ATC, delegating certain technical responsibilities to the PNF enhances overall situational awareness and operational effectiveness. Monitoring engine performance is also a shared responsibility and does not solely fall on the PF when the autopilot is disengaged.