identical unit or proportional unit of the body

time-rock unit =time-stratigraphic unit

acoustic sonar range prediction system {= ASRAPS}

active detection sonar

active sonar

active sonar detecion

active sonar detection

active sonar equation

Active sonar system

airborne sonar

Bathymetric Sidescan Sonar

bathymetric side-scan sonar

bistatic sonar

bottom scanning sonar

broad band sonar monitor

broadband constant beamwidth sonar

chirp sonar

digital active sonar

digital sonar