In G1000 avionics system is it possible, through the menu options, to deselect (switch off) the GPS?
The answer should be available in here:
Unplug the antenna cable…
Potentially a very interesting question and I bet it will comprehensively break it.
gallois wrote:
The G1000 on the DA42 has 2 GPS and each has it’s own circuit breaker.
The G1000 (don’t know about the G1000 NXi) has two integrated avionics units each including COM, NAV/ILS and GPS. They each have a COM and NAV circuit breaker. If you pull the NAV circuit breakers you’ll lose all radio navigation. Also, if you disable the GPS the AHRS will be more sensitive to failures.
GPS1/NAV1 and GPS2/NAV2 CBs will turn off both GPS and NAV.
This is also a thing to be worried about:
COM1 and COM2 are separate CBs. And to answer properly OP’s question – IIRC GPS can be turned off within system configuration like any other device.
Emir,
Can you specify the page number in the G1000 manual where the procedure of turning off the GPS is detailed? Many thanks
Yes, no problem, I’ll try to explain.
I fly G1000 with Cessna NAV III configuration. Many times I fly in areas with prolonged GPS blockade. Several times (in addition to the DR situation), it happened that the AHRS disappeared and started self reset (but no red X on the AHRS).
In normal situation you should still get a degraded AHRS, because Magnetic heading and barometric altitude are still present. My assumption is that if during that time a GPS position was spoofed and, let’s say for example, providing a GPS position that was seen to be traveling west when magnetic heading information says it’s traveling east. Then, because the AHRS doesn’t know which information is the correct one, it starts to reset.
The possible solution I was thinking about is temporarily disconnecting the GPS through the G1000 settings, before the GPS starts to spoof.
