Readback—November 2024

IFR Staff

Thursday, November 07, 2024 at 08:00 AM ET

Verified

Key Takeaways:

GPS spoofing, while rare, can be detected by a sudden jump in reported time or position, requiring verification against an independent, non-GPS time source.
Pilot professionalism is highlighted through the importance of making difficult "No-Go" decisions in pre-flight planning and using clear, constructive radio communication (e.g., N numbers) on CTAF.
While not legally mandated for general aviation by FAR §91.503, checklists are essential for safe operations, and complex hybrid approach procedures often accommodate both GPS (4-NM legs) and conventional (one-minute DME/LOC) navigation for holds.

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Spoofing Confusion

I enjoyed your “GPS Jamming, Spoofing” article in June 2024. Would you please expand on your comment that “GPS satellite spoofing attacks are often detected by a jump in the time reported from the GPS.”?

Where would I check to see if there was a “jump in the GPS time”? Does that mean that the time shown on the GPS status page won’t match the current time? We currently have a WAAS-enabled Garmin GNS 530 but are planning to upgrade the entire panel in six months.