Abstract: A radial sonobuoy launch system comprising a clam-shell launch tube and method for launching a sonobuoy. The clam-shell launch tube radially releases a sonobuoy and the clam-shell launch tube is reloaded during flight. The sonobuoys are pneumatically ejected about parallel to the airstream. A pressure boundary structure, having a door and a gate, maintains cabin pressure during reloading and launching. Support arms and drive arms evenly distribute the ejection accelerations from the firing mechanism and guide the trajectory of the sonobuoy during release. A clam-shell launch tube is capable of launching a multitude of differently sized sonobuoys.