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.
When mapping the bottom of the ocean, scientists avoid using these acoustic methods because there are other effective techniques.
( z1 avoid :ARG0 ( z2 scientist ) :ARG1 ( z3 use :ARG0 z2 :ARG1 ( z4 method :mod ( z5 acoustic ) :mod ( z6 this ) ) ) :time ( z7 map :ARG0 z2 :ARG1 ( z8 ocean :mod ( z9 bottom ) ) ) :ARG1-of ( z10 cause :ARG0 ( z11 technique :mod ( z12 other ) :ARG0-of ( z13 effective ) ) ) )