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Name: Johann
Status: other
Age: 30s
Location: N/A
Country: N/A
Date: 1999 


Question:
Would you know where I could get a formula to determine the angle of travel between two cartesian coordinates. For example: someone travelling on a ship knows the degrees-minutes-seconds of the start and end location. Based on a calculation, they set their compass to an angle between 0 and 360 degrees and that is the direction the ship is to travel. The formula should have some considerable degree of accuracy.


Replies:
You can derive one using a textbook on plane geometry and algebra. But, if you are really talking about a ship, then you are talking not about plane geometry and Cartesian axes, because the surface of the Earth is not a plane but a sphere. Hence you need a textbook on spherical trigonometry and/or navigation.

Grayce



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