Admiralty standard nautical charts.
Great Britain.Hydrographic Office.
Admiralty Standard Nautical Charts (SNCs) are the world's most widely used official paper charts. The range includes comprehensive paper coverage of commercial shipping routes, ports and harbours to help bridge crews safely navigate in accordance with SOLAS regulations. Coverage is global, with charts  appropriate for navigation of deep sea, coastal passages, port approaches and harbour berthing. A range of scales provide appropriate levels of detail and increase situational awareness, including large-scale charts for main ports and harbours, medium scale charts for coastal navigation and small-scale charts for offshore navigation.
The collection contains historic and current Admiralty Charts. Access is through listings held in the Maps Reading Room and graphic indexes in annual catalogues published by the Hydrographic Office.
Collection contains circa 35,000 charts.
Depths shown by isolines. Relief shown by contours and spot heights.
Sheets individually titled.
The Admiralty may change the area covered by a chart of a particular number at any time. Consult the graphic indexes for the appropriate time to access the charts.
Great Britain. Hydrographic Office.
Nautical charts.