... 10 Regulation of navigation and vessel-source pollution in the Northern Sea Route: Article 234 and state practice . The seaway known as the Northern Sea Route (NSR), ... reduction, and control of pollution of the marine environment. The said rules shall be pub- lished in Notices to Mariners. Accordingly, in 1990 the Regulations for Navigation on the Seaways of the Northern ... (NSRA), including the Guide to Navigating through the Northern Sea Route (NSR Navigation Guide) and the Requirements for the Design, Equipment and Supplies of Vessels Navigating the Northern Sea Route...