gnss - How much can Flight Level and GPS altitude differ?
Oct 11, 2025 · It depends primarily on the temperature of the air below the aircraft and to a smaller degree on the local barometric pressure. At indicated FL410 the GPS altitude could be …
gnss - Data for mapping a past flight? - Aviation Stack Exchange
Nov 29, 2023 · Is there a website that shows past flight tracks of a few days back? tells how to use FlightAware to see a past flight on a map. But is there any public source of …
gnss - Garmin 695/696 joystick removal - Aviation Stack Exchange
Jul 19, 2024 · I have a Garmin 696 with a faulty joystick. I have a parts unit that I'd like to swap the joystick with, however upon disassembling the units, I can see how to disconnect the …
gnss - What is a blind encoder? - Aviation Stack Exchange
Nov 19, 2018 · As I'm studying, I found that GPS has to have 5 satellites or 4 satellites with "blind encoders" to use RAIM. What is a blind encoder and what is its purpose?
gnss - How is "quantum technology" thought to provide a …
Mar 6, 2025 · Regarding GNSS navigation vulnerability, the targeted system is an improved inertial navigation system, more precise than GNSS, not relying on radio signals, with a cost …
gnss - Does Garmin G300 GPS use true heading or magnetic?
Jan 8, 2023 · Does Garmin G300 GPS use true heading or magnetic? Sorry couldn't find this information anywhere else.
gnss - Why do Computer Navigation Fixes still exist now that GPS ...
May 26, 2017 · A CNF is a point that defines a navigation track for a GPS, but why is it used when you there are GPS waypoints that are created to define a track?
gnss - Why are SBAS-equipped planes exempt from the preflight ...
Mar 13, 2021 · My question stems from this other question: Why is training regarding the loss of RAIM given so much more emphasis than training regarding the loss of SBAS? Two answers …
gnss - How can I keep the data on a KLN89b GPS up to date?
Mar 1, 2016 · I'm looking at a Mooney M20C with a pretty dated panel, but it's airworthy and could be a great opportunity to build some retrac time. The KLN89b GPS is IFR Certified, but is …
gnss - Why don't airliners have a navigation GPS as back up in …
Feb 1, 2015 · Why don't airliners have a navigation GPS as "back up" in case of a pitot tube malfunction? Aeropero 603 and Air France 447 plus many other im sure, could have been …