When should pilots expect to receive departure instructions from ATC?

Pilots should expect to receive departure instructions from ATC prior to takeoff, after clearance is granted. This is a standard procedure in air traffic control operations, where pilots receive a comprehensive clearance that includes not only the authorization to take off but also specific instructions regarding their initial climb, departure route, and any other pertinent information necessary for a safe departure.

Receiving departure instructions at this stage allows pilots to prepare adequately for takeoff, ensuring they are familiar with the expected flight path and any restrictions or changes that may affect their route. This proactive communication from ATC helps in maintaining safety and efficiency in the busy airspace around airports.

In contrast, options like receiving instructions as they enter controlled airspace or once they are airborne would not provide pilots with the necessary information ahead of time, potentially leading to confusion or delays during critical phases of flight. Similarly, receiving instructions during landing procedures does not apply, as it pertains to a different phase of flight focused on arrival and landing rather than departure.