En-route Holding (Overview)
- Wolfgang Scheucher
- Manfred Beckmann
The figure below shows the main AIXM 5 classes used for the holding concept.
The HoldingPattern class is used to code the basic data of an en-route holding, such as the inboundCourse, the turnDirection, upperLimit, lowerlimit and speedLimit.
The HoldingPattern is based on a holdingPoint, which is a SignificantPoint. The significant point may be a DesignatedPoint or a Navaid (see also SignificantPoint (Overview)). The designator of the significant point will also be the identifier of the Holding.
The HoldingPattern has an outboundLegSpan. This may be an endTime defined by a duration or an endDistance defined by a length or an endPoint defined by a significant point.
The latter case identifies the second waypoint of a two-point holding.
The HoldingPattern may be controlled by a Unit providing a Service that uses a certain radioCommunication.
