> coasts technically have infinite length Gloss indeed, I think you'd be find just doing the straight line distance between stations. Possibly radius' if it's

> coasts technically have infinite length Gloss indeed, I think you'd be find just doing the straight line distance between stations. Possibly radius' if it's a long way. We just need the relative distance to/from places not that actual surface area. If that's not good enough it'd be time to skip re-inventing the wheel and use the secondary port calculation.