Which color sticker indicates that no calibration is required?

The correct choice indicates that no calibration is required through the use of a white sticker with orange lettering. This particular color scheme is specifically designated to signal that the equipment or system in question is ready for use and does not need any adjustments or calibration before operation.

Understanding the significance of color coding in aviation maintenance is crucial as it allows personnel to quickly assess the status of equipment and take necessary actions without delay. Each color has its own meaning in terms of equipment readiness; in this instance, the white sticker with orange lettering clearly communicates an "all clear" status, thereby reducing the potential for mishaps that could arise from using equipment that hasn't been calibrated properly.

This color coding system enhances efficiency and safety in aviation operations, making it essential for all personnel to be familiar with these indicators. Other colors, such as red, green, or yellow, typically indicate different statuses that may require calibration or indicate a degree of caution, making it essential to refer to the specific meanings assigned to each color.