The vertical guidance component of the Instrument Landing System (ILS). The glideslope provides precise up/down information to help pilots maintain the correct descent angle, typically around 3°, on final approach to the runway.
Key characteristics:
- Signal: A UHF radio beam projected upward from beside the runway, forming an invisible descent path.
- Cockpit indication: Shown on the aircraft’s ILS instrument as a vertical deviation bar/needle that moves up or down depending on whether the aircraft is above or below the desired path.
- Standard angle: Usually 3°, though some runways may use steeper or shallower glideslopes depending on terrain and operational needs.
- Integration: The glideslope works together with the localizer (LOC) to provide full precision guidance, keeping the aircraft aligned both laterally and vertically until the decision height.
Application in DCS World
- Several DCS aircraft (F/A-18C, F-16C, A-10C, C-101, L-39, etc.) can capture and fly the glideslope signal where ILS is available, allowing cadets to train instrument approaches in poor visibility.
- Not all DCS runways include ILS/GS capability, and the system is simplified compared to reality (e.g., no false glideslope, terrain interference, or Category II/III operations).
Cadets should practice intercepting the glideslope from below, maintaining a stable descent, and transitioning to visual cues near decision altitude. This reinforces proper instrument landing discipline.