A three week survey conducted by the Marine Institute to carry out a herring acoustic survey in the North East Atlantic Ocean, off the coast of Ireland. The aim of an acoustic survey is to determine the relative abundance of the target species. This information is then used to determine catch rates and management advice for the following year. As well as studying the target species, each survey also collects oceanographic data as well and provides a platform for students to carry out their own research, and for observers to record seabird and marine mammal activity. Blue Whiting Gear Trials were also conducted on this cruise to test the gear. . Survey the abundance and distribution of target demersal fisheries species in the North Atlantic Ocean.