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An operational definition for spatial disorientation

P D Navathe¹, B Singh

¹Aeromedical Training Centre, Indian Air Force, Air Force Station Hindan, Ghaziabad.

Aviation, Space, and Environmental Medicine

|December 1, 1994

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Spatial disorientation (SD) lacks a clear definition in aviation, hindering accident investigation. This study proposes a practical operational definition for consistent classification of SD-related aircraft accidents.

Area of Science:

Aviation Safety
Human Factors in Aviation
Aerospace Accident Investigation

Background:

Spatial disorientation (SD) has varied interpretations across aviation disciplines.
Emergence of terms like situational awareness (SA) further complicates definitions.
Inconsistent definitions impede objective aircraft accident investigation and data comparison.

Purpose of the Study:

To address the semantic ambiguity surrounding spatial disorientation (SD).
To propose a unified, practical operational definition for SD.
To enhance the accuracy and consistency of aircraft accident investigations.

Main Methods:

Review and analysis of existing definitions of spatial disorientation.
Examination of the impact of definitional variance on accident investigation.

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Development of a proposed operational definition for SD.

Main Results:

Identified significant discrepancies in the understanding and application of SD definitions.
Highlighted the negative impact of definitional inconsistencies on accident classification.
Established a foundation for a standardized approach to SD in accident analysis.

Conclusions:

A clear, operational definition of spatial disorientation is crucial for aviation safety.
Standardized definitions facilitate reliable accident investigation and data analysis.
The proposed definition aims to improve inter-service comparisons and learning from incidents.