Originally Posted by
Wizofoz
What does a negative ground speed look like?
It looks like you're moving backwards. It's what happens when you fly at 50 knots airspeed into a 60 knot headwind. Groundspeed is -10 knots.
Originally Posted by
Wizofoz
So if two people are standing in the isle facing each other, one is going positive and one negative? Does one therefore not get to the destination?
Fortunately for the guy with the negative groundspeed, the destination is behind him.