These "clues" can warn of an error chain in progress - a series of events that may lead to an accident. Most accidents involving human error include at least four of these clues.
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Ambiguity - information from two or more sources that doesn't agree
Fixation - focusing on any one thing to the exclusion of everything else
Confusion - uncertainty or bafflement about a situation (often accompanied by anxiety or psychological discomfort)
Failure to fly the aircraft - everyone is focused on non-flying activities
Failure to look outside - everyone heads down
Failure to meet expected checkpoint on flight plan or profile ETA, fuel burn, etc.
Failure to adhere to SOPs
Failure to comply with limitations, minimums, regulatory requirements, etc.
Failure to resolve discrepancies - contradictory data or personal conflicts
Failure to communicate fully and effectively - vague or incomplete statements
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Table 3: Clues to Loss of SA (adapted from Bovier, 1997)
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