In aviation, how is static electricity typically discharged?

Static electricity is typically discharged through grounding, which involves connecting an object to the Earth or to a common reference point to safely channel away any build-up of electrical charge. In aviation, this is crucial because static electricity can create sparks that pose serious fire and safety hazards. Grounding is commonly implemented when fueling aircraft, during maintenance checks, or while handling sensitive electronic equipment. By ensuring that static charges are adequately discharged, the risk of igniting flammable fuels or damaging sensitive avionic systems is significantly reduced.

The other options do not serve the purpose of discharging static electricity in aviation contexts. Insulation is used to prevent electrical flow, resonance pertains to the frequency response of systems rather than static discharge, and hydration is unrelated in this context, as it refers to moisture content rather than electrical properties. Therefore, grounding is the correct method for safely discharging static electricity in aviation.