In the OFCR, how many pilots are allowed to rest at one time?

In the context of the Operational Flight Crew Rest (OFCR) regulations, the guideline specifies that only one pilot is allowed to rest at any given time during a flight. This requirement ensures that at least one pilot remains alert and able to operate the aircraft, which is crucial for maintaining safety during the flight.

Having a single pilot resting means that the other can monitor the flight, respond to any issues that may arise, and make crucial decisions to ensure the safety and smooth operation of the aircraft. This practice is especially important during long-haul flights where fatigue can be a significant factor for flight crews.

The other options do not align with the safety protocols in place for pilot rest. Allowing two or more pilots to rest simultaneously would compromise the necessary vigilance required during flight operations, which is why those choices do not satisfy the regulations.