Why is it wise to use great circle sailing?
Great Circle Sailing is used for long ocean passages. For this purpose, the earth is considered a perfect spherical shape; therefore, the shortest distance between two points on its surface is the arc of the great circle containing two points.
: a combination of great circle and parallel sailing in navigation.
What is the advantages and disadvantages of great circle sailing?
The advantage of a great circle is obvious, the shorter distance. The disadvantages, depending on latitude, could be quite a few. Colder weather, stronger winds, higher seas and perhaps even icebergs.
What is best advantage of Mercator sailing?
The main benefit of Mercator’s projection is that it is conformal (i.e., it preserves angles). Using this fact in navigation with a constant azimuth is very simple.
What is the meaning of great circle sailing?
A method of navigating a ship along the shortest navigable distance between the point of departure and the point of arrival. The shortest distance between any two points on a sphere is the circumference of the circle which joins them and whose centre is at the centre of the sphere.
What is parallel sailing?
: spherical sailing in which the course is along a parallel and departure is the product of cosine latitude times the difference of longitude —opposed to meridian sailing.
What is a composite great circle sailing method?
A method of sailing along the shortest route possible without crossing poleward of a specified latitude. … This comprises two great circle routes, the first starting at the place of departure with its vertex on a limiting parallel of latitude.
What is the formula of great circle sailing?
2nd file – Great Circle Sailing – Rhumb Line – (small program)
|calculation for incr. latitude||formula : ( 7915,7 * log tan (45° + lat/2)) – (3437,7 * e*e * sine lat)|
|calculation for init. course (oc great circle)||formula : ctg oc * sec lat.a = cosec long.diff. * tan lat.b – cot long.diff. * tan lat.a|
Why was plain sailing in the end?
The expression is mostly used in informal contexts to mean ‘smooth and easy progress’. When you say that something was plain sailing, you mean things went off without a hitch; there were no problems or obstructions of any kind along the way.
What is the difference between plane sailing and Mercator sailing?
* It is similar to plane sailing except that plane sailing is used for small distance. * In mercator sailing the d’lat is expressed in longitudinal units, which is the difference of meridianal parts. * In plane sailing the d’long is expressed in latitude units or Nautical miles.