Kystverkets istjeneste skal sørge for informasjon om is og seilingsforhold i norske farvann på strekningen svenskegrensen til Kristiansand, inkludert Oslofjorden.
The Norwegian Ice Service is administrated by the Norwegian Coastal Administration. The main task is to inform vessels about the ice situation in Norwegian waters from the Swedish border to Kristiansand, Oslofjorden included.