GPS failure in flight
Posted by Background_Tax556@reddit | flying | View on Reddit | 7 comments
We are trying to decide on avionics upgrades
If we have iPad minis that are cell-capable and a Garmin 355 or 375, the plan would be to use the Garmin as primary and link it to the iPad as a larger display. If we did that and the Garmin went out in flight, would the iPad be able to function as a GPS to at least give us our location? If so, would it require an active cell plan to do so?
x4457@reddit
If the Garmin isn't getting GPS, your iPad won't be either.
The odds of a unit failure on the new Garmin units is so astronomically low that you can basically consider it a non-factor.
But yes, assuming you did have a literal 1 in 1,000,000 hour failure of the unit, you can look at a chart on your iPad and yes, you do need a cellular model to have internal GPS. No, the plan does not need to be active.
nickjohnson@reddit
Civil aviation authorities believe it's likely enough that it's worth having backup instruments. "This device will never fall" is not a winning strategy in aviation.
x4457@reddit
Please show me the regulation that requires multiple GPS sources for anything other than extended overwater operations.
ErmakDimon@reddit
Apple devices are also able to receive not only GPS, but GLONASS, GALILEO and BeiDou.
About 80% of the time my G1000 showed NO GPS POSITION, my iPhone would still display my position correctly.
320sim@reddit
It might not be limited to failure of the Garmin itself. An alternator failure would eventually leave you without your Garmin or if a bus shorts out. I know a guy that had the electrical system explode into a fountain of sparks all over his legs
CaptMcMooney@reddit
if you tablets are cell versions, the tablet gps will continue to function. well unless it's a general gps outage 8)
you don't need cell service for it to work. also, depending on adsb solution might also be sending adsb-in and gps info
rFlyingTower@reddit
This is a copy of the original post body for posterity:
We are trying to decide on avionics upgrades
If we have iPad minis that are cell-capable and a Garmin 355 or 375, the plan would be to use the Garmin as primary and link it to the iPad as a larger display. If we did that and the Garmin went out in flight, would the iPad be able to function as a GPS to at least give us our location? If so, would it require an active cell plan to do so?
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