Situation awareness in air traffic control : enhanced displays for advanced operations
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Summary
This study addresses the challenges Air Traffic Control Specialists (ATCSs) face in maintaining situation awareness (SA) and safety under a "shared-separation" or "Free Flight" operational concept. In this future model, pilots assume greater responsibility for aircraft separation, shifting controllers from active command roles to passive monitoring. This transition reduces traffic predictability, potentially increasing controller workload and degrading SA. The research evaluates whether an enhanced display concept can mitigate these issues and compares various SA measurement techniques for future ATC research. The experiment utilized a within-participants design with ten experienced ATCSs. Participants completed six simulation trials (three per condition) in a high-fidelity ATC simulator. The independent variable was the display type: a baseline condition using standard radar displays and flight strips, and an enhanced condition featuring a text window on the radar screen. This window displayed the intended altitude, heading, or airspeed of aircraft in transitional states, simulating future datalink information from aircraft flight management systems. The scenarios involved scripted pilot maneuvers, including specific conflict situations requiring controller intervention. Dependent variables included objective performance metrics (conflicts, flights handled), subjective performance ratings by subject matter experts, workload assessments (NASA-TLX, ATWIT), and SA measures using the Situation Awareness Global Assessment Technique (SAGAT), on-line SA probes, and the Situational Awareness Rating Technique (SART). Results indicated that the enhanced display provided specific benefits for controller performance and SA, though not all findings were statistically significant. Controllers tended to make fewer ground-to-air transmissions when using the enhanced display, suggesting reduced need for advisory communications when pilot intentions were clear. Crucially, the enhanced display significantly improved controller awareness of which aircraft were conforming to issued advisories. However, controller mental workload increased with the enhanced display, likely due to the additional monitoring demands. The study also found considerable variability among the different SA measurement techniques, preventing definitive conclusions regarding their relative validity. Controllers reported that SAGAT was intrusive to operations, whereas on-line SA probes were less disruptive. The study concludes that enhanced displays offering pilot intent information have utility in supporting controller SA and performance in shared-separation environments, despite potential increases in mental workload. The findings suggest that further integration of such displays with existing radar systems could improve effectiveness. Additionally, the research highlights the need for careful selection of SA measurement tools in future studies, noting that non-intrusive methods like on-line probes may be preferable to freeze-based techniques like SAGAT in operational settings. The results support the feasibility of shared-separation concepts with appropriate technological aids.
Key finding
The enhanced display improved controller awareness of aircraft conformance and reduced communication frequency but increased mental workload in a simulated shared-separation environment.
Methodology
simulator
Sample size: 10
Provenance
The full processing record for this entry. Every stage of this paper's journey through the pipeline is logged — what ran, with which tool and model, how many attempts it took, and when it last completed. Discovered via author_sweep_intake on 2026-05-28.
| Stage | Outcome | Tool | Model | Prompt | Attempts | Completed |
|---|---|---|---|---|---|---|
| discover | success | author_sweep | — | — | 2 | 2026-05-28 |
| archive | success | canonical_url | — | — | 1 | 2026-06-06 |
| extract | success | cached | — | — | 3 | 2026-06-10 |
| clean | success | clean | — | — | 1 | 2026-06-04 |
| chunk | success | chunk | — | — | 1 | 2026-06-04 |
| embed | success | embed | Qwen/Qwen3-Embedding-8B | — | 1 | 2026-06-04 |
| enrich | success | — | — | — | 1 | 2026-05-28 |
| promote | success | — | — | — | 1 | 2026-06-04 |
| summarize | success | llm | qwen3.6-27b-prismaquant | summ-v5 | 2 | 2026-06-10 |
| tag | success | vector_similarity | — | — | 15 | 2026-06-11 |
| verify | success | — | — | — | 2 | 2026-06-10 |
Summary generated by qwen3.6-27b-prismaquant on 2026-06-10; verification: verified.
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