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Spatial disorientation-implicated accidents in Canadian forces, 1982-92

B Cheung¹, K Money, H Wright

¹Defence and Civil Institute of Environmental Medicine, North York, Ontario, Canada.

Aviation, Space, and Environmental Medicine

|June 1, 1995

Summary

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Spatial disorientation (SD) significantly impacts Canadian Forces pilots, with most accidents occurring during the day. Unrecognized SD was the primary cause, leading to substantial loss of life and aircraft.

Area of Science:

Aviation Safety
Human Factors Research
Aerospace Medicine

Background:

Spatial disorientation (SD) is a significant risk in aviation.
A recent survey indicated 44% of CF18 pilots reported experiencing SD.

Purpose of the Study:

To retrospectively analyze Canadian Forces (CF) Category A accidents implicated with SD between 1982-1992.
To understand the genesis and severity of disorientation in aviation mishaps.
To inform future research efforts and pilot training strategies.

Main Methods:

Reviewed mishap investigation summaries and Board of Inquiry reports for CF Category A accidents (1982-1992).
Assessed the role of SD as a contributing factor in aircraft accidents.
Categorized SD occurrences into Recognized (RSD), Unrecognized (USD), and Incapacitating (ISD).

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Main Results:

SD was a factor in 14 out of 62 Category A accidents.
The majority of SD-related accidents (all but two) were classified as Unrecognized SD (USD).
Eleven SD accidents resulted in 24 fatalities; most occurred during daylight, with experience not being a significant factor.

Conclusions:

Unrecognized Spatial Disorientation poses a critical threat in military aviation.
Further research and targeted pilot training are essential to mitigate SD risks.
Understanding environmental factors and illusion types (e.g., somatogravic) is crucial for prevention.