How does a VDGS connect to the stand and apron systems?
A docking system is not a lone display. It is told what to expect, checks the stand is ready, obeys the stop, and reports back to the people running the apron.
A VDGS works inside a stand, and the stand has other systems. The docking system takes in the expected aircraft type, the state of the boarding bridge and the emergency stop, reports out the stand status and its own health, and depends on apron lighting, power and network around it.
1What it is told
The expected type and flight details usually come from stand allocation or the airport’s flight data system, which is what the type check works from. The boarding bridge status shows whether the bridge is parked clear of the aircraft’s path. Many stands check this before docking starts.
2The emergency stop
Staff must be able to stop the docking at once. The VDGS should then show a clear stop indication to the pilot, and the stand’s procedures take over. Where the stop is wired or networked, and how it is reset, are system and airport decisions.
3What it reports
The system reports stand status, such as clear, aircraft arriving, docked and departing, and its own fault and health information. Airports use this for stand occupancy, for telling the bridge and ground handling that the aircraft has stopped, and for operational records. What is recorded and who receives it is the airport’s decision.
4Lighting, power and network
Floodlights, stand lighting and glare change what the display and the sensor see, and display brightness has to suit day and night. The VDGS also needs a dependable supply and network link. Annex 14 sets what the guidance must achieve, but the interfaces to other stand systems come from the manufacturer and the airport.
5What goes wrong
A lost link means no expected type or bridge status. The VDGS should not guess: it should fall back to a defined safe state with a clear indication, and staff use the stand’s procedures. A stale bridge signal, a mis-set stop input or glare from new lighting can all cause wrong or missing guidance. The pilot stays responsible for a safe stop.
| Interface | Direction | What it carries |
|---|---|---|
| Stand allocation / flight data | Into the VDGS | Expected type and flight details |
| Boarding bridge | Both ways | Bridge parked status in; docked status out |
| Emergency stop | Into the VDGS | Stop request; clear stop indication to the pilot |
| Airport operations | Out of the VDGS | Stand status and operational records |
| Monitoring | Out of the VDGS | Faults and health |
| Apron and stand lighting | Environment | Light level and glare the display and sensor must cope with |
| Power and network | Dependency | Supply, communication links and time |
Frequently Asked Questions
Q1What does a VDGS take in from other stand systems?
Typically the expected aircraft type and flight details from stand allocation or the airport's flight data system, the state of the boarding bridge, and the stand emergency stop. The exact signals depend on the system and the airport, so take them from the manufacturer's interface documentation.
Q2What does it send back?
Stand status such as clear, aircraft arriving, docked and departing, along with fault and health information. Airports often use this for stand occupancy and for operational records such as on-block times, but what is recorded is an airport decision.
Q3Why is the boarding bridge linked to the docking system?
A bridge that is not parked in its safe position can be struck by an arriving aircraft. Many stands therefore check the bridge position before docking starts, and some use the docking status to tell the bridge system the aircraft has stopped. The arrangement is set by the airport and the equipment suppliers.
Q4What does the emergency stop do?
It lets staff stop the docking at once. The VDGS should show a clear stop indication to the pilot, and the stand's procedures take over. Where the stop is wired or networked, and how it is reset, comes from the system design and the airport's procedures.
Q5How does apron lighting affect the docking system?
Floodlights, stand lighting and glare can change what the display and the sensor see, and display brightness has to suit both day and night. Aiming and control of the apron lighting are therefore checked with the VDGS in mind. Limits come from the manufacturer's data.
Q6What should happen if the link to the stand systems is lost?
The VDGS should not guess. If it has lost the expected type or the bridge status, it should fall back to a defined safe state, such as a clear indication that guidance is unavailable, and staff use the stand's procedures. The fallback behaviour is set by the manufacturer and the airport.
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