Which statement correctly pairs the autoland category with its minimums for CAT IIIB?

Which statement correctly pairs the autoland category with its minimums for CAT IIIB?

• A. CAT IIIB: 100' AH / 300 RVR; Both autopilot; Yes A/THR
• B. CAT IIIB: 50' DH / 600 RVR; One autopilot; Yes A/THR
• C. CAT IIIB: 100' DH / 1000 RVR; One autopilot; No A/THR
• D. CAT IIIB: 100' AH / 600 RVR; Both autopilot; Yes A/THR

Answer: (A)

In autoland, Cat IIIB minimums describe very low-visibility landings that rely on the automatic flight control system. The minima can be stated using an alert height (AH) or a decision height (DH), along with the Runway Visual Range (RVR). For Cat IIIB operations, the most stringent configuration typically requires both autopilots active and auto-thrust (A/THR) engaged, providing the level of automation and control needed in poor visibility. The pairing of 100 feet AH with 300 meters RVR, and with both autopilots engaged plus A/THR, fits that Cat IIIB autoland setup. It uses AH (not DH), and the visibility is consistent with Cat IIIB requirements while demanding full automation (two autopilots) and throttle automation. The other options either switch to DH instead of AH, use a higher RVR, or call for only one autopilot, which do not meet the standard Cat IIIB autoland configuration.

In autoland, Cat IIIB minimums describe very low-visibility landings that rely on the automatic flight control system. The minima can be stated using an alert height (AH) or a decision height (DH), along with the Runway Visual Range (RVR). For Cat IIIB operations, the most stringent configuration typically requires both autopilots active and auto-thrust (A/THR) engaged, providing the level of automation and control needed in poor visibility.

The pairing of 100 feet AH with 300 meters RVR, and with both autopilots engaged plus A/THR, fits that Cat IIIB autoland setup. It uses AH (not DH), and the visibility is consistent with Cat IIIB requirements while demanding full automation (two autopilots) and throttle automation.

The other options either switch to DH instead of AH, use a higher RVR, or call for only one autopilot, which do not meet the standard Cat IIIB autoland configuration.