Spatial disorientation (SD) poses a serious threat to flight safety. A pilot's gaze behaviour that characterizes his/her visual perception and attention determines success in dealing with this phenomenon. Regardless of a pilot's experience or proficiency, sensory illusions can lead to differences between instrument indications and what the pilot "feels". Understanding how simulator-induced SD cues affect gaze behaviour in pilots and non-pilots is our interest and was addressed as the aim of this research. Using a SD flight simulator, 40 male (20 military pilots; 20 non-pilots) were exposed to 12 flight sequences. We measured and compared subjects' gaze behaviour and flight performance in response to three visual and three motion illusions across two groups (pilots vs. non-pilots) and flight type (non-SD vs. SD flight). From the applied SD cues only in three illusions (false horizon, somatogyral, and Coriolis), the difference in visual attention distribution in comparison with non-SD flight was observed. There was no interaction of expertise and flight type. The pilots had shorter mean fixation time than non-pilots, except for landings. For the same SD flight profiles, we found the changes of the subjects' gaze behaviour and flight performance. The SD cues affect both the pilots and non-pilots in the same way; therefore, being an expert in piloting aircraft does not reduce the susceptibility of the pilot to loss of their spatial orientation. Eye-tracking technology could be useful in the analysis of the pilots' attention and better understanding and training of pilots' flight performance during SD events.
Objective This study investigated the effect of the spatial disorientation (SD) events on an attentive blank stare in the cockpit scene and demonstrated how much the flight task and visual delayed discrimination task were competing for the pilots’ attention. Background SD in flight is the leading cause of human error-related aircraft accidents in the military, general and commercial aviation, and has been an unsolved problem since the inception of flight. In-flight safety research, visually scanning cockpit instruments, and detecting changes are critical countermeasures against SD. Method Thirty male military pilots were performing a dual task involving piloting a flight simulator and visual change detection, while eye movements were obtained using an eye tracker. Results Pilots made more flight errors and spent less time gazing at the area of change in SD-conflict than in non-conflict flights. The vestibular origin SD-conflict led not only to deteriorated piloting and visual scanning but also to problems coordinating overt and covert attention, resulting in lower noticeability of visual changes despite gazing at them. Conclusion Our study shows that looking at a given area in space is not a sufficient condition for effective covert attention allocation and the correct response to a visual stimulus. It seems to be important to make pilots aware of this during SD training. Application To reduce change blindness, some strategies, such as reducing the number of secondary tasks is extremely valuable. Particular efforts should also be focused on improving the design of the aircraft cockpit by increasing the conspicuousness of critical information.
Objectives: Low back pain in pilots of military helicopters is widely discussed in the world literature. Vibrations and impro per seat configuration cause that cervical, thoracic and lumbar spine might be exposed to overloading. The aim of the study was to determine the incidence and intensity of pain in the spine as well as to identify subjective risk factors of back pain and its effect on the pilot's actions while flying a helicopter. Materials and Methods: 112 pilots, aged 25−56 years (mean age: 34.8±6.3 years), actively flying helicopters, participated in the questionnaire survey. The questionnaire containing five groups of questions, elaborated by the authors, was used. Results: 70% of the pilots reported pain complaints. Pain was lo calized in different parts of the spine. Uncomfortable body posture during prolonged flights resulting from the lack of lum bar support exerted the highest effect on pain provocation. Conclusions: This questionnaire survey enabled to determine the prevalence of pain, its type and intensity. Knowledge on low back pain imposes the necessity to eliminate the negative environmental effect on helicopter pilotage. Elimination of risk factors is possible through appropriate physical exercises and adjustment of pilots' seats. The authors plan to conduct -in the future -detailed annual examinations among pilots with back pain and, based on the results, to elaborate a prophylactic program containing simple forms of isometric and isotonic training involving paravertebral and deep abdominal muscles designed specifically for pilots of military helicopters.
INTRODUCTION: Working memory is an essential executive function for flying an aircraft and its limitations may jeopardize flight safety. This function is particularly critical when pilots have to struggle with spatial disorientation (SD) cues. This research aimed to assess the combined effect of the auditory N-back task (NBT) and simulator-induced SD cues on pilots’ flight performance.METHODS: Using an SD simulator, 39 male military pilots (control N = 20; age M = 31.6; SD = 8.22, experimental N = 19; age M = 26.9; SD = 8.67) were exposed to 12 flight sequences, where 6 contained an SD conflict—3 with vestibular illusions and 3 with visual illusions. Additionally, the pilots from the experimental group were asked to perform an auditory NBT involving sound stimuli (the sequential letter memory task) as they performed during oriented and disoriented flight conditions.RESULTS: Pilots’ flight performance from the NBT group were significantly worse than the control group in the approach and landing profiles involving visual illusions (for both nonconflict and conflict flight), and in the profile involving the false horizon illusion (only for the conflict flight). No increase in a pilot’s susceptibility to SD was observed with any other profiles.DISCUSSION: The current study provides support that pilots’ cognitive workload can negatively impact flight performance. Pilots are not always aware of altered flight parameters, which may indicate that they have lost spatial orientation, mainly as a result of visual illusion. If problems occur in maintaining proper flight parameters, pilots should direct all available mental resources to regain their orientation and withdraw from any other parallel tasks.Lewkowicz R, Stróżak P, Bałaj B, Francuz P. Auditory verbal working memory load effects on a simulator-induced spatial disorientation event. Aerosp Med Hum Perform. 2019; 90(6):531–539.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.