• Simple calibration technique for the split-beam echo-sounder 

      MacLennan, David N.; Svellingen, Ingvald (Fiskeridirektoratets skrifter, Serie Havundersøkelser, Research report, 1989)
      The split-beam echo-sounder is used to measure the target strength of fish. Calibration of this instrument requires sensitivity measurements to be made throughout the cross-section of the acoustic beam. It is necessary ...