sonic depth finder(n = noun.artifact) fathometer - depth finder for determining depth of water or a submerged object by means of ultrasound waves; Array
is a kind of depth finder
depth, depth bomb, depth charge, depth finder, depth gage, depth gauge, depth psychology, direction finder, finder, in depth, range finder, sonic, sonic barrier, sonic boom, sonic delay line, stud finder, synonym finder, view finder, water finder, word finder