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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