Abstract: A jet aircraft with integrated, rotary sonobuoy launch system has storage racks for a number of sonobuoys in sonobuoy launch containers; and one or more launcher units in its cabin. Each launcher unit has a pressure shell with a door allowing loading of sonobuoys in sonobuoy launch containers from the storage racks. With the door closed, the inside of the shell can be depressurized for launching a sonobuoy by opening a gate valve that connects the interior of the shell to the exterior of the aircraft. With the gate valve closed, the shell can pressurized so that the door can be opened and sonobuoys reloaded. A control system can be used to rotate a rotary launcher inside each pressure shell so that a selected sonobuoy is moved to a launch position above the gate valve and a launch tube, and a pneumatic system can be used to launch the sonobuoy.