Velocity indicator Surface position indicator (SPI.

To Zeitz, where it attaches to the JSC Shuttle Payload Integration and Development Program Office (SPIDPO) in.

4-46 DISPLAYS AND CONTROLS BREAKDOWN Display or control Quantity Toggle switches 827 Circuit breakers 430 Pushbutton switches 415 Rotary switches §3 Thumbwheel switches 29 Timers 4 Vernier potentiometers 97 Rotational hand controller.—The.