How To Get Mp In Mercator Sailing?

This video explains the calculation of course and distance using Mercator sailing formulae. It uses two examples to illustrate the process, focusing on the difference of meridional positions (DMP) and the course (C). The course is determined first by using the first formula, which converts the azimuth to a true answer. Mercator sailing is a common navigational calculation for determining courses and distances for passage planning and rendezvous.

To calculate DMP, we subtract the meridional parts of latitudes, as they are of the same sign. The course (C) is then calculated using the formula D. Lat., D.M.P., and D. Long.

The program MERCATOR calculates the course direction and distance in miles given two pairs of latitude (northsouth) and longitude ( DLAT = 342 NMI). To find the Meridional Parts (MP) of LAT A and LAT B, we use Bowditch Tables or direct calculation.

To get DMP, apply the same rule as for DLat, i.e., same names subtract, different names add. To get distance, use the plane sailing formula. Mercator sailing is used to calculate the position after sailing along a rhumb line other than in a North-South or East-West direction.

In summary, Mercator sailing is a useful tool for determining courses and distances for passage planning and rendezvous. By applying simple trigonometry principles and using numerical examples, mariners can better understand and solve navigational questions.