SIN-UIO gives 19783 km
BZJ-NPL gives 19937 km. GK wins.

You guys are great. And obviously you have time on your hands.

Since the earth is not a perfect sphere but in fact an ellipsoid, I think we might even do better (i.e > 20,000 km) along the equator than at an angle from it.

[This message has been edited by Droneklax (edited 08-25-2000).]