Instrument Landing System (ILS) statements — choose the correct combination: 1) It enables accurate approach and landing guidance under low-visibility conditions. 2) It includes a runway localizer, glide-path equipment, and marker beacons. 3) It is basically a blind (fully automatic) landing system.

Introduction:
The Instrument Landing System (ILS) provides precision radio guidance to aircraft on final approach. This item checks your familiarity with ILS components and its role relative to fully automatic “blind landing.”

Given Data / Assumptions:

• ILS comprises localizer (runway centerline guidance) and glide-slope (vertical path) plus marker beacons or DME for range.
• ILS supports low-visibility operations by giving precise course/vertical deviations.
• Autoland capability requires aircraft/airport certification and additional systems beyond basic ILS.

Concept / Approach:

Statements are evaluated against ICAO/FAA definitions. ILS provides guidance; it is not, by itself, a “blind landing” system. Autoland integrates flight-control and redundancy to flare/land without pilot visual reference, but that is separate from the radio aids themselves.

Step-by-Step Solution:

Verification / Alternative check:

Operational categories (CAT I–III) specify decision heights and RVR; higher categories allow lower minima but still distinguish between guidance (ILS) and automatic landing systems.

Why Other Options Are Wrong:

• All/1&3/2 only/3 only include the incorrect claim that ILS itself is a blind landing system or omit correct items.

Common Pitfalls:

Equating precision approach guidance with fully automatic touchdown/rollout; they are related but not identical.

Final Answer:

1 and 2 only