• Target tracking with a split-beam echo sounder 

      Brede, Raymond; Kristensen, Finn Hogne; Solli, Haakon; Ona, Egil (Conference object, 1990)
      The split-beam technique makes it possible to determine the precise location of a fish in the acoustic beam. This is a very useful feature, as it permits behavioural observations to be conducted without disturbing the fish. ...