NHS Chart 474: Porsgrunn - Skien Media:Paper British Admiralty Nautical Chart 1197:

British Admiralty Nautical Chart  1197: Plans on the West Coast of Africa is a standard nautical chart

including the characteristics of the ships

1 Hazardous Areas and their Determination

this tidal stream atlas offers precise information on tidal streams that is critical for safe and efficient voyage planning

NHS Chart 474: Porsgrunn - Skien Media:Paper British Admiralty Nautical Chart 1197:This nautical chart is provided by the Norwegian Hydrographic Service (NHS). In 2011, The Norwegian Hydrographic Service (a division of Kartverket responsible for marine navigation in Norway) signed an agreement with OceanGrafix enabling authorization to print and distribute nautical charts for Norway. The 100+ chartswhich comprise a majority of the charts produced by NHSare updated regularly using the same technology OceanGrafix developed to print US