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Meridian Sailing


A ship sails from Lat. 30° 20’ S and steams going south (180) for a distance of 180 miles. What is her arrival latitude?

Given:
              Latitude 30° 20’ S
             Distance = 180 miles

What is asked?
             Arrival latitude

Solution:

1.       Divide the distance by 60 to convert it into degrees. The result will be our Dlat.
            180 ÷ 60 = 3°

So the difference of latitude (dlat) is 03° 00’ S. The dlat is named south because the ship steams going south.

2.       Add the dlat and the latitude of departure (L1).
                    L1 = 30° 20’ S
                         +                  
                 Dlat = 03° 00’ S
                    L2 = 33° 20’ S is the arrival latitude
                                           
Meridian Sailing

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