Water sampling and temperature measurements were made with Nansen bottles. Salinity was measured with an inductive salinometer. The Winkler method was used for oxygen determination.
The bottom trawl was a high opening shrimp and fish trawl with rubber bobbins of 50 cm diametre. Headrope 41 m. Opening height during trawling approximately 6 m. Mesh size in the wings 40 mm, gradually reduced to 20 mm in the cod end.
The pelagic trawl is a capelin trawl with four equal panels, approximately 30 × 30 m at the opening. Height during trawling varying between 12 and 15 m, the larger when trawling with extra floats at the surface. Mesh size at cod end 30 mm. The pelagic trawl is monitored with a cable-connected net sonde.