Which function is needed to determine the distance in Mercator sailing?

What is Mercator sailing method?

[mər′kād·ər ‚sāl·iŋ] (navigation) A method of solving the various problems involving course, distance, difference of latitude, difference of longitude, and departure by considering them in the relation in which they are plotted on a Mercator chart.

What is the importance of using Mercator sailing in calculating for course and distance?

Charts used on board ships generally are Mercator charts. On these charts bearings, courses and distances can be directly read off or plotted on the charts. For calculating course and distance between two given points on surface of the earth, the Mercator sailing formula is more accurate than plane sailing formula.

What are the two categories of Mercator sailing?

In broad terms, there are two main types of sailing, namely, the Rhumb Line sailing and the Great Circle sailing.

What is a Mercator chart how was it made?

Mer·ca·tor projection

(mər-kā′tər) A method of making a flat map of the Earth’s surface so that the meridians and parallels appear as straight lines that cross at right angles. In a Mercator projection, the areas farther from the equator appear larger, making the polar regions greatly distorted.

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What is the applicable formula for finding the distance d in mid latitude sailing?

To Calculate The Distance Between Two Meridians Along A Parallel Of Latitude. The following formulas are used for calculating the difference in distance along a parallel of latitude (Ddist) corresponding to a difference in longitude (Dlong) and vice versa. Ddist = Dlong x Cos Lat. and Dlong = Ddist ÷ Cos Lat.

What are the limitations of a Mercator sailing?

Disadvantages of Mercator’s projection: – Mercator’s projection does not preserve lengths or areas further from the equator – the smallest distance on the globe is not realized by a straight line on the map – not suitable for teaching geography and in political maps (this projection distorts areas and sizes of states …

What is the purpose of using meridional parts in the calculation of course and distance?

The length of a meridian, increased between the Equator and any given latitude, expressed in minutes of arc at the Equator as a unit, constitutes the number of meridional parts corresponding to that latitude. Meridional-parts make it possible to construct a Mercator chart and to solve problems in Mercator sailing.

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.