RTA Waypoint Visual Encoding for Time Constraint Recognition
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Solution Overview
Problem
Current air traffic control methods impose a high workload on controllers and underutilize runway capacities by relying solely on aircraft current positions, and pilots face challenges in recognizing Required Time of Arrival (RTA) constraints, especially during descent and taxi operations, due to the complexity of lateral and vertical constraints.
Innovation Solution
A system that visually communicates RTA constraints by using a preprogrammed visual encoding scheme on an avionic display, including symbols next to RTA waypoints to indicate 'at', 'before', or 'after' time constraints, improving the human-machine interface and reducing pilot workload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Difficulty of detecting and measuring
If visual encoding schemes are added to RTA waypoints, then pilot recognition of time constraints is improved, but display complexity increases
Solution Approach 1:
The patent applies color-coded visual encoding schemes to RTA waypoints, where different colors represent different time constraint types (e.g., green for early arrival, red for late arrival). This allows pilots to instantly recognize the nature of time constraints at a glance without adding complex graphical elements, thus improving detection while minimizing display complexity increase.
Solution Approach 2:
The patent changes the visual parameters of waypoint symbols by adding temporal indicators such as time tags, arrows, or icons that indicate early/late arrival requirements. These parameter changes enhance the information content of existing waypoints without fundamentally redesigning the display system, balancing improved recognition with controlled complexity.
2Manufacturing precision
If multiple constraints (lateral and vertical) are imposed during descent, then trajectory precision is improved, but pilot workload increases
Solution Approach 1:
The patent segments multiple constraints into distinct visual categories on the display, separating lateral track constraints from vertical altitude constraints and RTA time constraints. Each constraint type is presented with its own visual notation, allowing pilots to process different constraint types independently rather than as a single complex set of instructions, thereby reducing cognitive workload while maintaining precision.
Solution Approach 2:
The patent adds a temporal dimension to the traditional spatial navigation display by incorporating time-based visual indicators alongside lateral and vertical constraints. This fourth dimension (time) is integrated into the display through visual encoding schemes that show when constraints must be met, helping pilots mentally organize and sequence multiple constraints more easily without increasing operational complexity.
Data Source
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AI summary
Systems and methods for presenting an RTA waypoint with associated time constraints. The system includes a flight management system (FMS) providing an assigned flight plan with a plurality of waypoints; a display device configured to render a current location and trajectory of the aircraft in a navigation display and in a vertical display; and a controller circuit. The system locates the RTA waypoint among the plurality of waypoints, as a function of the flight plan and the current location and trajectory of the aircraft. The system identifies a time constraint associated with the RTA waypoint. The system uses the time constraint to determine a type, from among an "at", a "before", and an "after", for the RTA waypoint; and, assigns a preprogrammed visual encoding scheme for the type to the RTA waypoint. The system presents the RTA waypoint, using the visual encoding scheme, on the display device.