These acoustic methods are now expected to be useful for the long-range remote sensing of schools of fish as well as for distant ocean bottom characterizations.
Accoustic methods can sense variations in depth.
( z1 possible :ARG1 ( z2 sense :ARG0 ( z3 method :mod ( z4 acoustics ) ) :ARG1 ( z5 vary :ARG1-of ( z6 deep ) ) ) )