The Norwegian Institute of Marine Research (the Contracting Authority) wishes to hire two combined purse/trawl vessels for comprehensive annual amounts estimation of mackerel, blue whiting and Norwegian spring-spawning herring in the Norwegian Sea and adjoining sea and coastal areas in the period 2027–2028. The contract will be valid for 2 years from 01.01.2027 until 31.12.2028. Signing of a contract over a period of two years means that the shipowner is obliged to provide the vessel for this expedition in the stated period and at the relevant time. The annual expeditions shall take place for approx. 28 days per vessel within the period from 28 June to 10 August.