Which of the following are the cabin pressurization modes of operation?

The cabin pressurization modes of operation include differential, unpressurized, and isobaric.

The term "differential" refers to maintaining a specific pressure differential between the cabin and the outside atmosphere, which is crucial for passenger comfort and safety. This mode allows the aircraft to ascend or descend while maintaining a suitable pressure level inside the cabin, ensuring that passengers are not exposed to harmful altitude effects.

"Unpressurized" indicates scenarios where the cabin is not pressurized. This could apply to certain aircraft types or flight conditions where maintaining cabin pressure is unnecessary.

"Isobaric" describes a state where there is constant pressure within the cabin as the aircraft changes altitude, allowing for a stable passenger environment despite external pressure changes.

This combination of terms reflects common pressurization modes used in aviation, highlighting essential operational considerations for aircraft cabin environments.