Norwegian ship registers: NIS, NOR and BYGG
The Norwegian ship registers include the Norwegian Ordinary Ship Register (NOR), the Norwegian International Ship Register (NIS), and the Shipbuilding Register (BYGG). Norwegian vessels of 15 meters and more must be registered in NOR or NIS, unless they are registered in a foreign ship or property register. Registration in BYGG is optional and available for vessels of 10 metres in overall length and upwards.