Some airplanes do not have jump seats in the cockpit, while others have one or two. In most airliners, the observers' seats have an audio selector panel so that the observer can monitor or participate in flight communications. An oxygen mask is provided for each station.
Not all planes have jump seats in the cockpit; some have none, while others have one or two. Typically, observer seats on commercial aircraft include an audio control panel that allows observers to participate in or monitor flight communications. Each observer position comes equipped with an oxygen supply system.