Ground-penetrating radar (GPR) is a powerful tool for subsurface scanning, but outdoor seating can significantly impact its accuracy. Metal chairs, tables, or concrete benches create reflections and interference, distorting radar signals. The density and material of seating structures absorb or scatter electromagnetic waves, masking deeper targets. To minimize errors, surveyors should clear the area or adjust frequency settings. Understanding these effects ensures reliable data in urban archaeology, utility detection, and construction planning. Proper planning and calibration can mitigate seating-related disruptions for precise GPR results.