What does the Gunner press after switching polarity on the MX-GCS sight from day to night?

What does the Gunner press after switching polarity on the MX-GCS sight from day to night?

• A. IR LED
• B. IR NUC
• C. Night Vision
• D. IR Illuminator

Answer: (B)

When you switch from day to night, the sensor’s different thermal environment can introduce image nonuniformities. The action you take is to run an infrared Non-Uniformity Correction, commonly called IR NUC. This calibration step adjusts the infrared detector’s pixel-to-pixel response and dark current so the night image stays clean and stable, reducing fixed-pattern noise that becomes noticeable in low-light conditions. IR LED and IR Illuminator are lighting elements used to illuminate a scene, not calibration actions, and Night Vision refers to the capability rather than a specific control you press.

When you switch from day to night, the sensor’s different thermal environment can introduce image nonuniformities. The action you take is to run an infrared Non-Uniformity Correction, commonly called IR NUC. This calibration step adjusts the infrared detector’s pixel-to-pixel response and dark current so the night image stays clean and stable, reducing fixed-pattern noise that becomes noticeable in low-light conditions.

IR LED and IR Illuminator are lighting elements used to illuminate a scene, not calibration actions, and Night Vision refers to the capability rather than a specific control you press.