Nautical charts, published by the Norwegian hydrographic office (Kartverket) and printed by Weilbach, are marked with POD (Print on Demand), and are corrected up to date when delivered from Weilbach. 

When the nautical charts are received onboard you must continue to keep them updated. Chart corrections for Norwegian nautical charts are published in the Norwegian Notice to Mariners (Etterrettninger for Sjøfarende (EfS)). EfS can be found on Kartverket website.