Since digital screens are not allowed in most cockpits for quick reference (during critical phases), you should create a paper backup.
A backup power source that ensures the system remains operational during momentary aircraft power interruptions. 2. Pre-Flight: Alignment Procedures ltn-92 manual
When the unit displayed “GYRO LOCK,” the manual instructed: “Reset circuit breaker #4, re-enter last known position, and fly straight for 3 minutes.” Mira did this while navigating by stars through a gap in the clouds. Since digital screens are not allowed in most