U.S. Navy Tests Sonobuoy Deployment from CH-53E Super Stallion Helicopter | Aviation

Reminiscent of early-World War I bomber tactics, the Navy has tested hand-deploying sonobuoys from the CH-53E heavy-lift helicopter.

Announced on Sept. 27, 2024, the United States Navy said it had “recently” tested hand-deployment of sonobuoys from a Sikorsky CH-53E Super Stallion as the service explores new tactics for a potential fight in the Pacific. The test consisted of a crewmember throwing the sonobuoy out of the open cargo door in the rear of the aircraft.

The helicopter, flying as part of Air Test and Evaluation Squadron Two One (HX-21), teamed up with Heavy Lift Helicopters Program Office (PMA-261) and Air Anti-Submarine Warfare Systems Program Office (PMA-264) for the test. The test was also overseen by the H-53 Lead Test Engineer, Adam Chesser.

“We evaluated the procedures and separation characteristics to ensure the sonobuoys would not strike the aircraft when launched,” said Chesser. “Clearing the heavy lift aircraft for sonobuoy deployment creates another level of redundancy for the Navy and provides more resources and flexibility to complete the mission.”

“The H-53 is purpose-built to carry heavy loads, but that’s not the limit…”