CPC Controller Workload Management & Human Factors 2 — Questions and Answers
Question 1: What is a 'readback/hearback' error in ATC communication, and what standard practice reduces it?
- A garbled transmission due to radio interference; fixed by equipment maintenance
- A controller failing to monitor the pilot's readback of a clearance; mitigated by active listening and verification (Correct answer)
- A pilot misunderstanding due to language barriers; fixed by English proficiency testing
- A frequency confusion error; fixed by frequency management software
Correct answer: A controller failing to monitor the pilot's readback of a clearance; mitigated by active listening and verification
Hearback errors occur when a controller fails to catch an incorrect pilot readback; active monitoring of readbacks and challenging incorrect ones is the primary mitigation.
Question 2: What is the 'PEAR' model in human factors, relevant to ATC error analysis?
- People, Environment, Actions, Resources — a framework for analyzing human performance factors (Correct answer)
- Precision, Execution, Accuracy, Response — a performance standard
- Position, Equipment, Air Traffic, Routing — a sector management model
- Priority, Evaluation, Assessment, Risk — an emergency protocol
Correct answer: People, Environment, Actions, Resources — a framework for analyzing human performance factors
The PEAR model (People, Environment, Actions, Resources) provides a structured framework for analyzing factors that contribute to human performance and error in aviation.
Question 3: What is an 'automation surprise' in modern ATC, and why is it a human factors concern?
- Unexpected radar dropouts causing blank scopes
- When automated systems take unexpected actions that conflict with the controller's mental model (Correct answer)
- Software updates that change interface layouts without warning
- Automated ATIS changes without controller notice
Correct answer: When automated systems take unexpected actions that conflict with the controller's mental model
Automation surprises occur when automated tools (like STCA or ERAM) take actions or display information that contradicts the controller's situational awareness, potentially causing disorientation.
Question 4: What is the purpose of STCA (Short Term Conflict Alert) in ATC operations?
- To file conflict reports automatically
- To provide audible and visual alerts when radar predicts two aircraft may violate separation (Correct answer)
- To block conflicting flight plan entries
- To automatically reroute conflicting traffic
Correct answer: To provide audible and visual alerts when radar predicts two aircraft may violate separation
STCA is a safety net tool that generates alerts when the system predicts two aircraft will violate separation minima within a short time period, giving controllers time to intervene.
Question 5: Controller fatigue is primarily managed through which FAA-mandated mechanism?
- Mandatory energy drink provisions
- Scheduled rest requirements and shift rotation limits in FAA Order 7110.65 (Correct answer)
- Voluntary self-reporting of tiredness
- Automated workload reduction after 6 hours on position
Correct answer: Scheduled rest requirements and shift rotation limits in FAA Order 7110.65
FAA scheduling requirements mandate minimum rest between shifts and limit consecutive hours on position to manage cumulative fatigue in controllers.
Question 6: What is 'complacency' in ATC human factors, and in what environment does it most commonly develop?
- Aggressiveness in issuing clearances; develops in high-traffic environments
- Reduced vigilance due to routine or low-traffic periods; develops in low-demand environments (Correct answer)
- Ignoring supervisory instructions; develops from poor training
- Over-confidence in equipment; develops after system upgrades
Correct answer: Reduced vigilance due to routine or low-traffic periods; develops in low-demand environments
Complacency develops during low-traffic or routine periods when controllers become less vigilant, potentially missing conflicts or errors that they would catch during high-alert operations.
CPC Controller Workload Management & Human Factors 2
What is a 'readback/hearback' error in ATC communication, and what standard practice reduces it?