Which nonprecision approach utilizes only the localizer component of an ILS system?

The Localizer (LOC) approach is a type of nonprecision approach that specifically uses the localizer component of an Instrument Landing System (ILS) for lateral guidance. The localizer provides lateral guidance to the runway centerline, allowing pilots to align their aircraft with the runway during the final approach phase. Unlike full ILS approaches that also include glide slope information for vertical guidance, the LOC approach relies solely on the localizer for horizontal positioning.

This makes the LOC approach suitable for situations where vertical guidance is not available or needed, providing a means to conduct an approach when weather conditions require instruments but do not allow for a precision approach. Pilots can fly the LOC approach by maintaining the localizer signal, ensuring proper alignment with the runway for landing.

The other approach types, such as VOR, NDB, and visual approaches, utilize different navigational aids or methods and do not specifically focus on using just the localizer component of an ILS system.