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2. Nautical chart - Wikipedia

   en.wikipedia.org/wiki/Nautical_chart

   A nautical chart or hydrographic chart is a graphic representation of a sea region or water body and adjacent coasts or banks. Depending on the scale of the chart, it may show depths of water ( bathymetry) and heights of land ( topography ), natural features of the seabed, details of the coastline, navigational hazards, locations of natural and ...

3. Light characteristic - Wikipedia

   en.wikipedia.org/wiki/Light_characteristic

   Light characteristic. A light characteristic is all of the properties that make a particular navigational light identifiable. Graphical and textual descriptions of navigational light sequences and colours are displayed on nautical charts and in Light Lists with the chart symbol for a lighthouse, lightvessel, buoy or sea mark with a light on it.

4. Bowditch's American Practical Navigator - Wikipedia

   en.wikipedia.org/wiki/Bowditch's_American...

   The American Practical Navigator (colloquially often referred to as Bowditch ), originally written by Nathaniel Bowditch, is an encyclopedia of navigation. It serves as a valuable handbook on oceanography and meteorology, and contains useful tables and a maritime glossary. In 1867 the copyright and plates were bought by the Hydrographic Office ...

5. Admiralty chart - Wikipedia

   en.wikipedia.org/wiki/Admiralty_chart

   Thus the chart coloration gave a clear indication to users as to whether they were using a chart with depths in fathoms or feet. While depths and heights were in metres, the nautical mile continued to be an international standard. Derived from the length of 1 minute of latitude, it is defined as 1852 metres.

6. Sailing Directions - Wikipedia

   en.wikipedia.org/wiki/Sailing_Directions

   The chart information graphics, the first items in each sector, are a graphic key for charts and digital nautical charts (DNC) pertaining to a sector. The graduation of the border scale of the chartlets enable navigators to identify the largest scale chart for a location and to find a feature listed in the index-gazetteer.

7. Electronic navigational chart - Wikipedia

   en.wikipedia.org/wiki/Electronic_navigational_chart

   An electronic navigational chart ( ENC) is an official database created by a national hydrographic office for use with an Electronic Chart Display and Information System ( ECDIS ). [1] ECDIS and ENCs are the primary means of electronic navigation on cargo ships. [1] Charts can be used in navigation to provide an indication of location once a ...