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2. Great-circle navigation - Wikipedia

   en.wikipedia.org/wiki/Great-circle_navigation

   Great Circle Map Interactive tool for plotting great circle routes on a sphere. Great Circle Mapper Interactive tool for plotting great circle routes. Great Circle Calculator deriving (initial) course and distance between two points. Great Circle Distance Graphical tool for drawing great circles over maps. Also shows distance and azimuth in a ...

3. Course (navigation) - Wikipedia

   en.wikipedia.org/wiki/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.

4. Nautical chart - Wikipedia

   en.wikipedia.org/wiki/Nautical_chart

   A bearing is the angle between the line joining the two points of interest and the line from one of the points to the north, such as a ship's course or a compass reading to a landmark. On nautical charts, the top of the chart is always true north, rather than magnetic north, towards which a compass points.

5. Plotter (instrument) - Wikipedia

   en.wikipedia.org/wiki/Plotter_(instrument)

   In navigational instruments, a plotter is an instrument which marks the position of a vehicle on a map or chart. Types ... Course (navigation) References

6. Rhumb line - Wikipedia

   en.wikipedia.org/wiki/Rhumb_line

   On a north–south passage the rhumb line course coincides with a great circle, as it does on an east–west passage along the equator. On a Mercator projection map, any rhumb line is a straight line; a rhumb line can be drawn on such a map between any two points on Earth without going off the edge of the map. But theoretically a loxodrome can ...

7. Navigation - Wikipedia

   en.wikipedia.org/wiki/Navigation

   Another special technique, known as the Franklin Continuous Radar Plot Technique, involves drawing the path a radar object should follow on the radar display if the ship stays on its planned course. [38] During the transit, the navigator can check that the ship is on track by checking that the pip lies on the drawn line. [38]