acoustic (sonar) positioning

acoustic sonar range prediction system {= ASRAPS}

active detection sonar

active sonar

active sonar detecion

active sonar detection

active sonar equation

Active sonar system

air transportable sonar

air transportable sonar {= AIS}

airborne sonar

antistranding sonar

Attitude stabilization of a sonar array

AUV detected sonar system

azimuth scanning sonar equipment

Bathymetric Sidescan Sonar

bathymetric side-scan sonar

bistatic sonar

bi-static sonar