Category II (CAT II) ILS is described as:

Category II (CAT II) ILS is described as:

• A. Basic ILS with no inner marker.
• B. ILS without any RVR criteria.
• C. ILS with no inner marker and specific RVR.
• D. Basic ILS with an inner marker and specific RVR criteria.

Answer: (D)

Category II ILS adds precision and tighter weather minimums to a standard ILS. A defining feature is the inner marker, which provides a fixed reference on the final approach path when visibility is reduced. Along with that, there are specific Runway Visual Range (RVR) criteria that must be met to continue the approach and land. These elements—an inner marker and defined RVR minimums—distinguish CAT II from basic ILS and other configurations. Without an inner marker, or without clearly prescribed RVR criteria, the approach would not meet CAT II standards.

Category II ILS adds precision and tighter weather minimums to a standard ILS. A defining feature is the inner marker, which provides a fixed reference on the final approach path when visibility is reduced. Along with that, there are specific Runway Visual Range (RVR) criteria that must be met to continue the approach and land. These elements—an inner marker and defined RVR minimums—distinguish CAT II from basic ILS and other configurations. Without an inner marker, or without clearly prescribed RVR criteria, the approach would not meet CAT II standards.