The Collins 332D-11A Vertical Reference Gyro is a source of attitude reference information used in integrated flight systems and automatic flight control systems. Three-wire 400 Hz synchro outputs provided in both roll and pitch axes conform to ARINC specifications. The equipment features roll cutout, monitoring circuits, and built-in starting cycle. Self-testing and manual recycling can easily be furnished by appropriate external wiring. Fast erection is automatic during starting in 250 seconds maximum.

The 332D-11A is 6.00 inches high, 7.875 inches long, 5.75 inches wide and weighs 7.20 pounds. Variations of the 332D-11A are available with a fast erection switch and stiffer rubber mounts. The 332D-11A operates in an altitude range of -1,000 feet to +40,000 feet and temperature range of -54°C to +70°C.