Which statement describes one of the weaknesses of GPS?

• A. Subject to satellite, weather, and interference problems.
• B. Always error-free.
• C. Only usable at night.
• D. Requires no signals.

Answer: (A)

GPS weaknesses come from its reliance on signals from satellites and the way those signals travel through the atmosphere. If satellites have issues or aren’t visible from your location, you can lose the fix or see degraded accuracy. Weather and space-weather effects can delay or distort signal timing as the signals pass through the ionosphere and troposphere, introducing errors. Interference, whether from jammers, clutter, or multipath reflections off surfaces, can also degrade reception. This combination of satellite limitations, atmospheric impacts, and interference is why a statement describing susceptibility to satellite problems, weather-related delays, and interference best describes GPS weaknesses. GPS is not always error-free, it works day and night, and it requires signals from satellites.