Which three GNSS vulnerabilities SEW operators must consider and why they matter?

• A. Jamming, spoofing, and multipath/receiver vulnerability to weak signals; they can cause erroneous navigation and timing, reducing mission effectiveness.
• B. Weather disturbances, solar flares, and ground station outages
• C. Encryption weakness, bandwidth shortage, and user authentication
• D. Antenna color, cable length, and operator preference

Answer: (A)

GNSS vulnerability for SEW operators centers on how navigation and timing data can be disrupted or manipulated: jamming, spoofing, and weakness to weak signals or multipath. Jamming floods GNSS bands with interference, blocking reception and causing loss of lock or large position/time errors, which disrupts navigation and timing-critical operations. Spoofing introduces counterfeit signals that deceive the receiver into computing false positions or times, potentially leading to misguidance, mis-timing, and degraded mission coordination. Multipath and weak-signal conditions arise when signals reflect off surfaces or arrive at low strength, producing inaccurate fixes and timing offsets that erode reliability and precision, especially in challenging environments. These vulnerabilities matter because SEW relies on accurate, robust navigation and timing to control assets, synchronize systems, and execute coordinated operations. Other factors like weather disturbances, solar activity, or ground-station outages are not direct GNSS vulnerabilities in the same actionable sense, and encryption or hardware attributes don’t capture the immediate reliability threats to GNSS integrity in SEW the way these three do.