Acoustic distance measuring apparatus and method of use
Acoustic navigation and diving information system and method
Acoustic positioning system
Acoustic reflector
Acoustic sensing arrangements
Acoustic survey technique
Acoustic transponder receiver circuit
Acoustic under sea position measurement system
Aerodynamic housing
Air-deliverable, ice-penetrating sonobuoy
Antisubmarine warfare system
Apparatus for determining range and bearing
Automatic attenuator for sonobuoys
Autonomous oceanographic profiler