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transverse (or inverse) Mercator or transverse (or in-verse) orthomorphic. The Mercator is the most common projection used in maritime navigation, primarily because rhumb lines plot as straight lines. In a simple conic projection, points on the surface of the earth are transferred to a tangent cone. In the Lambert
On a Mercator projection, a great circle appears as a sine curve, concave to the equator, extending equal distanc-es on each side of the equator. The rhumb line connecting any two points of the great circle on the same side of the equator is a chord of the curve. If the two points are on op-
NAVIGATION Mercator Sailing Mercator Sailing is another method of Rhumb Line Sailing. It is used to find the course and distance between two positions that are in different latitudes from the large D. Lat. and distance. It is similar to plane sailing, except that plane sailing is used for small distances.
In this unit, you will learn that Mercators Projection possesses many advantages as it preserves the uniformity of the areas transferred from the curved surface of the earth to the plane surface of the chart, which is so vital for navigation. Objectives. After studying this unit, you should be able to.
Sailings are also various methods of navigating from one position to the other, i.e. rhumb line (constant course) sailing or great circle (changing course) sailing or composite sailing. In this unit, only parallel, plane sailing and Mercator sailing will be discussed.
The resulting triangle can be drawn onto a Mercator chart, hence the name Mercator sailing. As is the case on a Mercator chart, the lines of longitude are all equidistant, however, the parallels of latitude are not, as their distance increases towards the poles
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.
