Which indicator signals that the focus limit has been reached during target acquisition?

• A. Amber missile indicator
• B. Green WFOV or NFOV indicators flashing
• C. Red CLU BIT failure indicator
• D. Blue indicator

Answer: (B)

During target acquisition, the sight uses two fields of view—wide and narrow—to bring the target into sharp focus. When you’ve reached the limit of how far you can adjust focus in the current view, the green indicators for the wide-field or the narrow-field view will flash. That flashing signals you’ve hit the maximum (or minimum) focus travel for that mode, and you should switch views or re-acquire at a different range to continue refining the target.

The other indicators don’t relate to the focus limit: the amber missile indicator generally signals missile status, the red CLU BIT failure indicator points to a launcher unit fault, and the blue indicator isn’t used to show focus limits.