Final answer:
The normal position of the IR mode rotary selectors in the ADIRS panel varies depending on the aircraft model and manufacturer, but it is typically set to the NAV mode for navigation purposes.
Step-by-step explanation:
The normal position of the IR mode rotary selectors in the ADIRS panel depends on the specific aircraft and its manufacturer. However, in general, the IR mode rotary selectors are usually set to the NAV mode as the default or normal position. This mode allows the aircraft to navigate using data from the Inertial Reference System (IRS).
For example, in the Airbus A320 aircraft, the IR mode rotary selectors are set to the NAV mode by default when the ADIRS panel is turned on. In this mode, the aircraft uses the IRS to provide accurate position information for navigation purposes.
It's important to note that different aircraft models may have variations in the functionality and settings of their ADIRS panels, so it's always recommended to consult the aircraft's specific documentation for the accurate information regarding the normal position of the IR mode rotary selectors.