Stand guidance system

[1] The Parallax Aircraft Parking Aid is frequently combined with an AGNIS system, informing flight crews when to stop.

As this system relies on the position of the viewer, it will not give accurate distance information to aircraft which have deviated significantly from the stand centreline.

Used in combination with AGNIS at stands which can only accept smaller airliners, it features one or two mirrors, allowing the flightcrew to see ground markings in relation to their nose wheel, when it is within the area they need to stop.

[1] Advanced Visual Docking Guidance Systems feature electronic displays which perform the functions of an AGNIS/PAPA installation, although with much greater accuracy.

The azimuth guidance, based on the Moiré Pattern works independently of the laser that calculates distance to stop and is unaffected by weather conditions.

The green lights on the left and right of the display will begin to appear, from bottom to top, as the aircraft gets closer to the stop line.

The latest models developed by ADB Safegate are called Safedock X and Flex which provides advanced functionality including detection through radar system.

An ADB Safegate A-VDGS installed on Stand K3L at Mumbai Airport .
AGNIS is shown on the left, in this example the aircraft is right of the centreline.

On the right is a prototypical PAPA , which features no moving parts or electronics.

The two systems are not shown to scale, an AGNIS lightbox is many times smaller than a PAPA box
RLG GIS 206-2 at KLIA2 , Malaysia
Aircraft location: 16 meters from stop position, to the right of centreline
Aircraft location: 16 meters from stop position, to the right of centreline
Aircraft location: Nose landing gear positioned on centreline at stop position
Aircraft location: Nose landing gear positioned on centreline at stop position
An example of a Safedock S model display. The aircraft parking is a B757 which is left of the centreline. The vertical yellow bar in the centre disappears, from bottom to top, as the aircraft approaches the stopping point.