07 Convergence And Conversion Angle

Question 1

What is the equation for the Earth Convergence?

Answer 1

EC = Ch.Long (degrees) x Sin(mean Lat)

Question 2

What is the definition of Earth Convergence?

Answer 2

Earth Convergence is the angle of inclination between any two maridians

Question 3

What will an AC track do if in the following conditions:

• North Hemisphere travelling West
• North Hemisphere travelling East
• South Hemisphere travelling West
• South Hemisphere travelling East

Answer 3

• Decrease
• Increase
• Increase
• Decrease

Question 4

What is the definition of the Conversion Angle?

Answer 4

Angular difference between a great circle and a rhumb line

Question 5

What is the equation for the Conversion Angle?

Answer 5

CA = 0.5 * EC

CA = 0.5 x Ch.Long (degrees) x Sin(mean Lat)

Question 6

What is the average Great Circle Track equal to?

Answer 6

The Rhumb line track between the same two points

Question 7

If two points are at equal latitude, what can be said about the Rhumb line track between the two points?

Answer 7

It is either equal to 90 degrees or 270 degrees (depending on the direction travelled)