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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.
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
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
• 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 Mercator Sailing is the most accurate method employed in marine navigation to handle calculations related to Rhumb Line sailing. Rhumb Line. It may be difficult to believe that if you sail on a constant course, except on exact East or exact West, you will end up at the North or the South pole, assuming there is no land in between.
for use in marine or air navigation. Nautical charts depict features of particular interest to the marine navigator. Charts have probably existed since at least 600 BC. Stereo-graphic and orthographic projections date from the 2nd century BC. In 1569 Gerardus Mercator published a chart using the mathematical principle which now bears his name.
