A crew rest compartment (crew rest) is a section of an airliner dedicated for breaks and sleeping by crew members, usually located above or adjacent to the passenger compartment. Crew rest compartments are normally segregated, with separate compartments for the flight crew and the cabin crew.
On long flights, crew members may sleep in crew rest compartments during off-duty periods. Federal Aviation Regulations have provisions requiring crew rest areas be provided in order to operate a long flight by using multiple crew shifts.
Passengers are restricted from accessing crew rest compartments by regulations, additionally their entrances may be secured by locks and may require ascending a ladder for access.