Figure 7 . Representative ship EK80 echosounder calibration examples with full beam mapping exercise (left) and calibration results (right) displayed. Calibrations shown: (a) 12-22 kHz, (b) 34-45 kHz, (c) 50-85 kHz, (d) 95-165 kHz, (e) 170-260 kHz, (f) 280-380 kHz pulses. (g) show EC150-3C ADCP / echosounder system calibration. Operated as echosounder with 138-162 kHz broadband pulses. WC57.2 was used for (a) and (b), WC38.1 was used for (c), (d), (e), WC22 for (f), and WC25 for (g).
