These themes show fishing activity based on data from satellite tracking and catch reporting. Tracking data is linked with information from catch reporting in order to filter out periods involving activities other than fishing, before generating a line density plot.

Norwegian fishing vessels are shown per quarter.

All fishing vessels of more than 15 metres transmit position reports to the Norwegian Fisheries Monitoring Centre (FMC). The boundary is 12 metres outside 4 nautical miles in the Skagerrak. The normal tracking frequency is one position report per hour. The coverage level declines north of a latitude of N76˚ depending on the type of tracking equipment.

Norwegian vessels report independent area, while foreign vessels only transmit data when they are in our waters: The Norwegian Economic Zone, the fishing zone around Jan Mayen and the fish conservation zone at Svalbard. We have no data from Russian, British or Irish vessels in the fish conservation zone.

Foreign fishing vessels are shown per year.

Foreign vessels only transmit data when they are in our waters: The Norwegian Economic Zone, the fishing zone around Jan Mayen and the fish conservation zone at Svalbard. We have no data from Russian, British or Irish vessels in the fish conservation zone (outside the territorial boundary).

Like Norwegian vessels, EU vessels also report their electronic catch logs every day, while Russian vessels only report catches per week.