Where are instrument range markings typically placed?

Instrument range markings are typically placed over the dial face's calibrations on the cover glass. This placement serves a critical function, as it allows pilots and operators to easily read and interpret the information displayed on the instrument while minimizing distractions. By having these markings directly over the calibrated readings, it enhances visibility and ensures that the pilot can quickly identify safe operating ranges and critical parameters at a glance.

Having the markings on the outer edge of the instrument panel or inside the cockpit near the instruments may theoretically provide information, but those locations are not as effective for immediate reference during flight, where quick and clear access to data is essential. Similarly, placing markings on the back of the instrument would make them inaccessible and therefore impractical for operational use. The correct placement over the dial face is key to promoting safety and efficiency in aircraft operations.