"druck"  wrote in message
news:purto0$vg4$1@dont-email.me...
> 2) GPS far less than perfect when used in aircraft, and is only
>    ever used in addition to other navigation and precision approach
>    systems.

That's interesting. I'd have thought that with a good aerial and no
obstructions so you can see lots of satellites you should be able to get
very good results.

My phone varies between about 20m and 5m radius of error for lateral
movement. Not sure how accurate it is for altitude. I sometimes find that I
get a systematic error which causes a track to follow the twists and turns
in a road perfectly - except offset by maybe 100 m.

What are the current "other navigation and precision approach systems"? Is
it still NDB, VOR and ILS, or have things moved on since I used to "fly"
planes in MS Flight Simulator?

--- SoupGate-Win32 v1.05