| 摘要 |
A method of facilitating the approach to a platform by an aircraft, the method comprising a step of constructing a database, including for each stored platform at least one identifier of the platform, coordinates of a geometrical center of the platform, a height of the geometrical center, and the radius (OR) of a circle in which the platform lies. During a parameter-setting step, the target platform to be reached, a course to be followed, and a height parameter relative to a minimum decision altitude are determined. During a path construction step, the positions of an initial approach fix (IAF), of a final approach fix (FAF), and of a decision point (MAP) are determined by placing them in a plane that is offset relative to the platform. |
| 主权项 |
1. A method of facilitating the approach to a platform by an aircraft, comprising:
a preparatory step (STP1) of constructing a database of platforms including for each platform at least one attribute defining the platform; a parameter-setting step (STP2) of setting parameters onboard an aircraft in a parameter-setting module in order to determine the following pieces of information:
a course (CRS) to be followed in order to reach a platform referred to as the “target platform” to be reached;a height parameter relative to a minimum decision altitude (MDA) of a decision point (MAP) for a final approach descent towards the target platform; a construction step (STP3) for constructing an approach path implemented by a navigation module; during the preparatory step (STP1), a step of storing, for at least one platform, attributes defining at least one target zone constituting a destination, the at least one target zone including a geometrical center of the platform, the attributes for the geometrical center comprising geographical coordinates of the geometrical center, at least one height of the geometrical center, and the radius referred to as the “obstacle radius” (OR) of a circle centered on the geometrical center in which the platform lies; during the parameter-setting step (STP2), a step of determining a lateral distance (LOV), and of determining a target zone that is referred to as the “selected target zone” selected from the stored target zones; and during a construction step (STP3), if the selected target zone is a geometrical center, a step of constructing the approach path by determining the positions of an initial approach fix (IAF), of the final approach fix (FAF), and of the decision point (MAP) in response to the information and to the attributes of the selected target zone, the initial approach fix (IAF) as well as the final approach fix (FAF) and the decision point (MAP) being present in a common vertical plane directed parallel to the course (CRS), the geometrical center being offset relative to the vertical plane by an orthogonal distance (D0) equal to the sum of the lateral distance (LOV) and of the obstacle radius (OR). |
