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Mixed Great Circle . . . .
         

 

Initial Course

1st Initial Course :

Sen Ri = cos ln x sec l

 

Rumb line in the parallel of latitud of Ice Gate

 

 

 

2nd. Initial Course:

Sen Ri = cos ln x sec l´

 

Distance calculations

Cos D1= sen l x cosec ln

Cos D2 = senl x cosec ln

If cos D is + get < 90º

If cos D is - get > 90º

 

 
         
         
 

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