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excel will use the best formula according to the value of the course (0°-90°) orthodromic distance (gc great circle) formula : cos gc = (sine lat a * sine lat b) + (cos lat a * cos lat b * cos longitude diff.)
- Plotting Sheet for Celestial Navigation
universal plotting sheets for celestial navigation . also...
- The Nautical Almanac
The Nautical Almanac - Sun and stars. by Capt. Roberto Iori....
- Star Finder for Astro Navigation
The stellar planisphere in an excel file was created for...
- Errors, Tips & Tricks
the nautical sextant in celestial navigation . How to use a...
- Radar Navigation
RML - Relative Motion Line; SRM - Speed of relative motion;...
- Weather Weblinks
Surface pressure charts: ananalysis & forecast charts by Met...
- Plotting Sheet for Celestial Navigation
Rhumb line calculation: Departure position (latitude, longitude) + Course and Distance, to compute Arrival position; Departure position + Arrival position, to compute Course and Distance; Path of constant course between Departure position and Arrival position. Great Circle calculation
Celestial navigation course for beginners. Voyage planning/passage planning tool. Single rhumb line and great circle calculations on an ellipsoid.
Short distance sailing is a term which is applied to sailing along a rhumb-line for distances less than 600 nautical miles. From the formulas derived above, the following are used extensively in short distance sailing:
The formulas enable to solve the tasks with a use of electronic calculator and application of traditional methods on plane and sphere, and they also take the Earth’s ellipsoidal shape into consideration. Keywords: loxodrome (rhumb-line sailing), plane (or middle latitude) sailing, Mercator triangle (Mercator sailing) 1. Introduction
Calculation of a distance on loxodrome (rhumb line) and course angle (azimuth) between two points with a given geographical coordinates.
comparing the Great Circle and the Rhumb Line tracks between place of departure at 6000N 01000E and different destinations, all of which are located on the 6000N parallel. In this case the Rhumb Line track will be 270°, and the Rhumb Line distance is easy to calculate, using the formula for departure. Observing the Great Circle track and