Editing Sonar (section)

=== Aircraft ===
[[File:SH-3H HS-15 lowers AQS-13 sonar 1979.JPEG|thumb|[[AN/AQS-13]] dipping sonar deployed from an [[H-3 Sea King]]]]

Helicopters can be used for antisubmarine warfare by deploying fields of active-passive sonobuoys or can operate dipping sonar, such as the [[AQS-13]].  Fixed wing aircraft can also deploy sonobuoys and have greater endurance and capacity to deploy them.  Processing from the sonobuoys or [[Geophysical MASINT#Airborne dipping sonar|dipping sonar]] can be on the aircraft or on ship.  Dipping sonar has the advantage of being deployable to depths appropriate to daily conditions. Helicopters have also been used for mine countermeasure missions using towed sonars such as the [[AQS-20A]].