Final answer:
In a non-radar environment, a two-minute separation is provided when a light aircraft departs behind a medium aircraft, or any aircraft departs behind a heavy aircraft, to prevent wake turbulence incidents.
Step-by-step explanation:
In a non-radar environment, any aircraft departing behind a heavy aircraft or a light aircraft departing behind a medium aircraft will be provided with a two-minute separation under the following conditions:
- The first aircraft is classified as heavy, and the second aircraft is operating in its wake.
- The second aircraft is a light aircraft departing behind a medium aircraft, which would have a significant performance difference in wake turbulence.
This ensures adequate separation to prevent wake turbulence incidents, which can be dangerous for the trailing aircraft. The Federal Aviation Administration regulates these separations for the safety of all aircraft in flight.