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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. Sea mark - Wikipedia

   en.wikipedia.org/wiki/Sea_mark

   Sea mark. A sea mark, also seamark and navigation mark, is a form of aid to navigation and pilotage that identifies the approximate position of a maritime channel, hazard, or administrative area to allow boats, ships, and seaplanes to navigate safely. There are three types of sea mark: beacons fixed to the seabed or on shore, towers (sometimes ...

5. Electronic navigational chart - Wikipedia

   en.wikipedia.org/wiki/Electronic_navigational_chart

   An Electronic Navigational Chart (ENC) is a digital representation of a real-world geographical area for the purpose of Marine navigation.Real-world objects and areas of navigational significance, or to a lesser degree - informational significance, are portrayed through Raster facsimiles of traditional paper charts; or more commonly through vector images, which are able to scale their relative ...

6. Cardinal mark - Wikipedia

   en.wikipedia.org/wiki/Cardinal_mark

   The lights shown here are configured as "Quick". A cardinal mark is a sea mark (a buoy or other floating or fixed structure) commonly used in maritime pilotage to indicate the position of a hazard and the direction of safe water. Cardinal marks indicate the direction of safety as a cardinal (compass) direction (north, east, south or west ...

7. List of stars for navigation - Wikipedia

   en.wikipedia.org/wiki/List_of_stars_for_navigation

   References like the Nautical Almanac and The American Practical Navigator provide four star charts, covering different portions of the celestial sphere. Two of these charts are azimuthal equidistant projections of the north and south poles. The other two cover the equatorial region of the celestial sphere, from the declination of 30° south to ...

8. Lateral mark - Wikipedia

   en.wikipedia.org/wiki/Lateral_mark

   Lateral mark. Visual Buoyage - Region B - By day. A lateral buoy, lateral post or lateral mark, as defined by the International Association of Marine Aids to Navigation and Lighthouse Authorities, is a sea mark used in maritime pilotage to indicate the edge of a channel. Each mark indicates the edge of the safe water channel in terms of port ...

9. Nautical star - Wikipedia

   en.wikipedia.org/wiki/Nautical_star

   The nautical star is an informal signifier indicating membership in the United States Coast Guard, United States Navy, or United States Marine Corps. The symbol recalls both the five-pointed star of the US national flag and the color pattern of the compass rose found on many nautical charts. Insignia including nautical stars: