When departing behind a large aircraft, when should you rotate?

The correct choice indicates that you should rotate before the large aircraft's rotation. This is critical for maintaining adequate separation during takeoff. When you are departing behind a large aircraft, it is essential to consider the wake turbulence they produce, which can pose significant risks to smaller aircraft during their takeoff phase.

By rotating before the large aircraft lifts off, you ensure that you clear any large vortices that may be generated by their wings, as these vortices tend to sink and spread out behind the larger aircraft. This approach helps to mitigate the risk of encountering those turbulent effects when you are airborne.

In contrast, waiting to rotate at the same time as the large aircraft can put your aircraft at risk by remaining in an area that could be affected by the wake. Rotating after the aircraft is airborne could also increase the chances of encountering wake turbulence. Lastly, choosing to rotate only after reaching a safe distance might not provide an immediate effective solution, as the turbulent air created by the large aircraft could remain influential even at a distance. Thus, timing your rotation prior to the large aircraft’s takeoff is the safest and most effective practice.