How long does the white box around an active FMA mode remain visible after activation?

How long does the white box around an active FMA mode remain visible after activation?

• A. 5 seconds
• B. 10 seconds
• C. 15 seconds
• D. 20 seconds

Answer: (B)

When an FMA mode is activated, a white box around that active mode provides a clear, temporary confirmatory cue to the pilot. The box stays visible for ten seconds to ensure you notice the change and recognize that the mode has been captured, even if other changes occur right after. After ten seconds, the highlight isn’t needed for ongoing awareness, so it disappears to keep the display uncluttered. The other durations would either be too short to reliably notice or too long, leading to unnecessary visual clutter.

When an FMA mode is activated, a white box around that active mode provides a clear, temporary confirmatory cue to the pilot. The box stays visible for ten seconds to ensure you notice the change and recognize that the mode has been captured, even if other changes occur right after. After ten seconds, the highlight isn’t needed for ongoing awareness, so it disappears to keep the display uncluttered. The other durations would either be too short to reliably notice or too long, leading to unnecessary visual clutter.