Intercalibration of acoustic systems onboard R/V "Johan Hjort" and R/V "Pinro"
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Inter-ship calibration is a comparison between integrator output of two or more ships sailing over the same fish aggregations. Although it is a relative measurement, it is highly desireable whenever research vessels work together on acoustic surveys. It is used to verify results of absolute calibrations and may also elucidate possible ship effect on abundance estimates. An inter-ship calibration between two cooperative research are presented and the results discussed with respect to difference in performance.