Mercator Sailing
Origin (Initial Position)
Latitude:
degrees minutes
Longitude:
degrees minutes
Destination (Final Position)
Latitude:
degrees minutes
Longitude:
degrees minutes
Results :
Course to make : degrees true
Distance to make : nautical miles
Cumulative Distance : nautical miles

This calculator computes the rhumb line course between two points with given latitude and longitude - aka Mercator sailing. The earth is taken to be the WGS84 spheroid.