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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.
• explain the underlying principle of the mercator projection, • state properties, advantages and limitations of a mercator chart, and • calculate courses and distances by using mercator’s formula.
The document describes Mercator projection and Mercator sailing. It explains how Mercator projection constructs nautical charts by wrapping a cylinder around a globe and projecting the parallels and meridians.
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
Navigational computer programs and calculators commonly contain algorithms for computing all of the problems of the sailings. This chapter discusses basic calculation methods and tabular solutions. Navigators can also refer to National Geospatial-Intelligence Agency (NGA) Pub. 151, Distances Between Ports, for distances
Mercator sailing is a method used to find the course and distance between two positions that are at different latitudes. It involves calculating the difference in meridional parts (D.M.P.), which is analogous to difference in latitude (D.Lat.) in plane sailing.
Mercator Projection - Most nautical charts are based on the Mercator Projection. - Rhumb lines, Meridians and Parallels are represented by straight lines. - Meridians and parallels are perpendicular to each other, simplifying plotting positions. 8
