Describe the appropriate use of composite great circle sailing” method in navigation?

Question: Describe the appropriate use of composite great circle sailing” method in navigation?

Composite great circle sailing is a method of navigation that allows a vessel to follow the shortest route possible without crossing poleward of a specified latitude. This method is useful when a direct great circle route would take the vessel into high latitudes or over land. Composite great circle sailing involves three steps:

1. Sail along a great circle arc from the departure point to the vertex on the limiting parallel of latitude.

2. Sail along the limiting parallel (a rhumb line) to the vertex of another great circle arc that passes through the destination point.

3. Sail along the second great circle arc to the destination point.

Composite great circle sailing combines the advantages of both rhumb line and great circle sailing. It reduces the distance travelled compared to a rhumb line route, and it avoids the difficulties of steering a constantly changing course angle as in a great circle route.

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