Which approach is associated with glide slope capability but not classified as precision?

The approach that is associated with glide slope capability but is not classified as precision is LDA with glide slope.

LDA, or Localizer Type Directional Aid, operates similarly to an ILS (Instrument Landing System) but does not provide precision approach guidance. It uses a localizer signal for lateral guidance but typically lacks the stringent criteria that define a precision approach. However, when an LDA approach is equipped with a glide slope, it can provide vertical guidance in a manner similar to an ILS, offering pilots useful information for descent. The addition of glide slope capability enhances the approach but does not elevate it to the standard of a precision approach, as it still generally does not meet the necessary accuracy and operational criteria established for such classifications.

In contrast, ILS is classified as a precision approach because it includes both lateral and vertical guidance, and it adheres to precise criteria for operation. The NDB (Non-Directional Beacon) does not provide glide slope information and is categorized as a non-precision approach. ASR (Airport Surveillance Radar) provides a surveillance-based approach that also does not meet precision approach standards, mainly serving for radar vectoring rather than a defined glide path. Therefore, LDA with glide slope stands out as the