Norwegian blue whiting investigation in March/April 1981.

Acoustic measurements on blue whiting in the area north and west of Scotland were carried out from 9 March to 4 April 1981. The survey was in partly coordination with a U.K. survey, and an intercalibration of the two vessels' acoustic instruments was worked. The Norwegian research vessel recorded blue whiting in various densities over the whole area from the western coast of Norway to the northern coast of Ireland, with highest concentrations off the slope west of the Hebrides