|What's the difference between Rhumb Line and Great Circle?|
NavigX supports two navigation methods - Rhumb Line and Great Circle. This article describes what each method is.
Great Circle Path (or Orthodrome) - Navigating a Great Circle path over the surface of the earth ensures that you travel the shortest possible distance over the surface of the globe.
Rhumb Line (or Loxodrome) - Navigating a Rhumb Line ensures that you travel in a straight line over the surface. It isn't necessarily the shortest path.
Why the difference? Well, if you're a sea-fairing type, the easiest way for you to navigate over a long distance is to set your compass bearing and follow that until you reach your destination so you follow a Rhumb Line. If you follow a Great Circle path, you need to constantly adjust your compass bearing to follow the path.
In the field tests we did with NavigX, for the most part, it matters not which method you set if you're using NavigX for navigating on foot. If, however, you're using NavigX on a yacht, some consideration needs to be given as to which is going to be best for you.
As with all settings for NavigX, you can find these in the Settings app under 'NavigX'.