What type of instruments does the auxiliary battery support?

The auxiliary battery primarily supports standby instruments. Standby instruments are critical for maintaining flight safety in the event of a primary power failure. These instruments provide essential flight information, such as altitude, airspeed, and heading, allowing pilots to navigate and control the aircraft effectively under emergency conditions.

In situations where the main electrical systems are compromised, the auxiliary battery ensures that these crucial standby instruments remain operational, directly supporting the pilot's situational awareness and decision-making capabilities. This function highlights the importance of standby instruments as a backup system, allowing for continued safe operation until normal power is restored or a safe landing can be made.