Originally Posted by
Wizofoz
How do you quote on an Android??
Vesbot, you didn't deal with the guy standung sideways- is his groundspeed positive or negative?
It's zero in relation to the body axes, but that definition starts being useless then. You can say it's 500 sideways, which is kinda clunky and not useful for much, but it is at least useful in figuring out how soon he'll get to the destination.
Now it's your turn again to deal with the Cessna flying at 50 knots into a 60 knot headwind. What's his groundspeed?