Final answer:
EGI ON/OFF switches are located in an aircraft's cockpit and are found on the instrument or navigation system control panel, varying by aircraft model.
Step-by-step explanation:
The EGI (Embedded GPS Internal Navigation System) ON/OFF switches are typically located within the cockpit of an aircraft and can be found on the aircraft's instrument panel or navigation system control panel. The specific location can vary depending on the aircraft model and design, but they're generally placed for easy access by the pilot for quick enabling or disabling of the EGI system. These switches are critical components of an aircraft's navigation system, allowing the pilot to engage or disengage the EGI as required for accurate navigation and positioning.