NHS Nautical Chart NHS083: Dyrøya - Gibostad Gulf of Finland The red background implies that

The red background implies that the flag can be used at sea while the dark blue background means the flag can be used on land

environmental advocates

Used as a pair to transfer a directional line on a chart

Facility managers

It is also used for measuring or laying off courses and distances on a nautical chart

NHS Nautical Chart NHS083: Dyrøya - Gibostad Gulf of Finland The red background implies thatThis 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