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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. OpenCPN - Wikipedia

   en.wikipedia.org/wiki/OpenCPN

   OpenCPN (Open C hart P lotter N avigator) is a free software maritime chart plotter and navigation software for use underway or as a planning tool. Developed by a team of active sailors and tested in real world conditions, it has multiple supported chart formats and a variety of data inputs. [3][4] By using satellite navigation and other NMEA ...

4. 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 ...

5. Set and drift - Wikipedia

   en.wikipedia.org/wiki/Set_and_drift

   Step 1. Plot out course of 150 degrees true on Radar Plotting Sheet; Step 2. Measure length of course by using speed of 8 knots and converting into nautical miles via the time, speed, and distance scale; Step 3. Plot the length of speed on Radar Plotting sheet; Step 4. Plot out desired course of 166 degrees true on Radar Plotting Sheet; Step 5.

6. Course (navigation) - Wikipedia

   en.wikipedia.org/wiki/Course_(navigation)

   Course (navigation) Instruments used to plot a course on a nautical chart. In navigation, the course of a watercraft or aircraft is the cardinal direction in which the craft is to be steered. The course is to be distinguished from the heading, which is the direction where the watercraft's bow or the aircraft's nose is pointed. [1][2][3]

7. Navigational instrument - Wikipedia

   en.wikipedia.org/wiki/Navigational_instrument

   Navigational instrument. Navigational instruments are instruments used by nautical navigators and pilots as tools of their trade. The purpose of navigation is to ascertain the present position and to determine the speed, direction, etc. to arrive at the port or point of destination.