Final and Initial course angle of a great circle course between two geographical positions
DRAW POLE IF
IF N > S ; DRAW NORTH POLE
IF S > N ; DRAW SOUTH POLE
IF BOTH N ; DRAW NORTH POLE
IF BOTH S ; DRAW SOUTH POLE
IF ICA AND FCA SAME QUADRANTS VERTEX LIES OUTSIDE A AND B
AND DRAWN TOWARDS HIGHER LATITUDE
IF ICA AND FCA DIFFERENT QUADRANTS VERTEX LIES BETWEEN A AND B
DRAWN TOWARDS HIGHER LATITUDE
Final and Initial course angle of a Great Circle Course
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-1.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-2-e1678515999125.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-3.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-4.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-5.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-6.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-7.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-8.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-9.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-10.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-12.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-14.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-15.jpg)
In the example (below), the Course angle has been taken randomly for understanding purposes.
![](https://sailorsknowit.com/wp-content/uploads/2023/03/Great-Circle-Angle-16.jpg)