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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: To Calculate Departure when the course is not known: dep.= d.long cos(mean lat)
Calculation of a distance on loxodrome (rhumb line) and course angle (azimuth) between two points with a given geographical coordinates.
Online rhumb line calculations using the RhumbSolve utility. Rhumb Line calculation: Inverse: lat1 lon1 lat2 lon2. → azi12 s12. Direct: lat1 lon1 azi12 s12. → lat2 lon2. Input (ex. « 40.6 -73.8 49°01'N 2°33'E » [inverse], « 40d38'23"N 073d46'44"W 53d30' 5850e3 » [direct]): . Output format: Decimal degrees. Degrees minutes seconds.
In broad terms, there are two main types of sailing, namely, the Rhumb Line sailing and the Great Circle sailing. The Mercator Sailing is the most accurate method employed in marine navigation to handle calculations related to Rhumb Line sailing.
calculation for incr. latitude. formula : ( 7915,7 * log tan (45° + lat/2)) - (3437,7 * e*e * sine lat) course (c.) or (bearing) rhumb. formula : tang. c. = longitude difference/increased latitude difference. loxodromic distance (rhumb line) c. < 45° = latititude diff. * sec c. 45° < c. < 87° = latititude diff. * tg c. * cosec c.
Choose your calculation: 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.
