What is the proper way to ground an aircraft?

The proper way to ground an aircraft involves the procedure of connecting the ground to the aircraft, which is often referred to as "Ground to Aircraft." This method ensures that any static electricity or electrical charge accumulated on the aircraft is safely discharged to the ground, thereby preventing any risk of spark or fire when performing maintenance or refueling operations.

This practice is crucial for ensuring safety around the aircraft, particularly in preventing potential ignition of flammable vapors or fuels. By grounding in this manner, the charge is effectively neutralized, providing a safer environment for personnel working on or near the aircraft.

Other options may reference grounding techniques, but they do not convey the standard practice as effectively or accurately. For example, options that suggest grounding directly to the ground or using a ground rod might imply incorrect methods or setups that don't adhere to the preferred protocols for aviation safety. The choice that emphasizes grounding to the aircraft illustrates the correct approach to effectively mitigate any risks associated with electrical charges.