GPS use
Jul 4, 2006 | 4:59 am
#16
Join Date: Jan 2006
Location: ABE/PHL
Programs: CO Pt Infinite (1k life)/ 1MM - NW/DL Silver life/1 MM
Posts: 1,309
Originally Posted by steve64
It's the curvature of the earth.
Think "Line of Sight" literally...
Think "Line of Sight" literally...
1.23 * (altitude (ft.) ^ 1/2) = horizon (sm).
@ 40000 ft:
1.23 * 200 = 246 st. miles
I read somewhere once that a circle w/ a radius of this is something like 8% of the surface area of the US.
added: That dumb thumb is supposed to be an exponent operator.
Last edited by carpboy; Jul 4, 2006 at 1:25 pm Reason: stoopid icon
Jul 4, 2006 | 8:14 am
#17
Join Date: Oct 2003
Location: Baltimore, MD
Programs: Delta murdered it. RIP WorldPerks
Posts: 337
Originally Posted by sbagdon
Track your physical location, in 3 dimensions.
I can't remember how many times I've red-eyed, and wondered what the town was I was flying over. I'd like it even more if I knew the path (and what side of a big city we were going to be on) so I could shift seats to watch a city go by. I've seen Chicago from cruise altitiude on a clear night during a red-eye, and it was amazing.
Steve B.
I can't remember how many times I've red-eyed, and wondered what the town was I was flying over. I'd like it even more if I knew the path (and what side of a big city we were going to be on) so I could shift seats to watch a city go by. I've seen Chicago from cruise altitiude on a clear night during a red-eye, and it was amazing.
Steve B.
Jul 5, 2006 | 7:27 pm
#18
Join Date: Jan 2006
Location: Southwest Ohio, USA
Programs: HH/Diamond; PC/Gold; NWA/Gold
Posts: 99
Logic would seem to dictate that it's okay to use a GPS unit in flight -- at least some of them. I have a pilot's license, and always have flown with my portable GPS (air/marine/road variety). It's difficult to believe that a device specifically designed for a pilot's use would interfere with anything in the plane!