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Helicopter Pilots Synchronize Their Altitude with Ship Heave to Minimize Energy When Landing on a Ship's Deck.

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Title: Helicopter Pilots Synchronize Their Altitude with Ship Heave to Minimize Energy When Landing on a Ship's Deck.
Authors: Thomas, Mathieu, Pereira Figueira, José M., Serres, Julien R, Rakotomamonjy, Thomas, Ruffier, Franck, Morice, Antoine HP
Source: International Journal of Aerospace Psychology. Apr-Jun2021, Vol. 31 Issue 2, p135-148. 14p.
Subjects: Helicopter pilots, Helicopter accidents, Decks (Naval architecture), Kinetic energy, Statistical correlation
Abstract: Objective: This study aims at investigating helicopter pilots' strategies to achieve ship deck landing. Background: Helicopter maritime operations are challenging, especially when it comes to landing on the moving decks of small ships, such as frigates, which can lead to dramatic accidents. Method: Expert pilots were requested to fly the full ship landing maneuver from approach to touchdown in an immersive simulator. Two sea states (3 and 4 on the Douglas Sea scale) and their resulting deck movements were used. Changes in helicopter altitude were correlated with deck heave movements throughout the maneuvers in order to scrutinize the helicopter-deck coupling. The energy at impact was measured. Results: The dynamics of helicopter-deck coupling evolved through two phases during the maneuver: Initially, no coupling then, coupling in phase between the helicopter vertical displacements and deck heave displacements. Moreover, the coupling reached higher values within the last 15 m to landing, corresponding to a hover phase and touchdown, and the correlation increased with sea level. This coupling might help in improving pilots' safety since the greater the coupling at touchdown, the lesser the kinetic energy at impact. Conclusion: Coupling the helicopter vertical displacements with ship heave movements seems to be an efficient strategy to minimize energy at impact. Questions arise on both the rationale and the perceptual invariant behind such behavior and indicate the necessity of further investigation. [ABSTRACT FROM AUTHOR]
Copyright of International Journal of Aerospace Psychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Psychology and Behavioral Sciences Collection
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  Data: Helicopter Pilots Synchronize Their Altitude with Ship Heave to Minimize Energy When Landing on a Ship's Deck.
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  Data: <searchLink fieldCode="JN" term="%22International+Journal+of+Aerospace+Psychology%22">International Journal of Aerospace Psychology</searchLink>. Apr-Jun2021, Vol. 31 Issue 2, p135-148. 14p.
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  Data: <searchLink fieldCode="DE" term="%22Helicopter+pilots%22">Helicopter pilots</searchLink><br /><searchLink fieldCode="DE" term="%22Helicopter+accidents%22">Helicopter accidents</searchLink><br /><searchLink fieldCode="DE" term="%22Decks+%28Naval+architecture%29%22">Decks (Naval architecture)</searchLink><br /><searchLink fieldCode="DE" term="%22Kinetic+energy%22">Kinetic energy</searchLink><br /><searchLink fieldCode="DE" term="%22Statistical+correlation%22">Statistical correlation</searchLink>
– Name: Abstract
  Label: Abstract
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  Data: Objective: This study aims at investigating helicopter pilots' strategies to achieve ship deck landing. Background: Helicopter maritime operations are challenging, especially when it comes to landing on the moving decks of small ships, such as frigates, which can lead to dramatic accidents. Method: Expert pilots were requested to fly the full ship landing maneuver from approach to touchdown in an immersive simulator. Two sea states (3 and 4 on the Douglas Sea scale) and their resulting deck movements were used. Changes in helicopter altitude were correlated with deck heave movements throughout the maneuvers in order to scrutinize the helicopter-deck coupling. The energy at impact was measured. Results: The dynamics of helicopter-deck coupling evolved through two phases during the maneuver: Initially, no coupling then, coupling in phase between the helicopter vertical displacements and deck heave displacements. Moreover, the coupling reached higher values within the last 15 m to landing, corresponding to a hover phase and touchdown, and the correlation increased with sea level. This coupling might help in improving pilots' safety since the greater the coupling at touchdown, the lesser the kinetic energy at impact. Conclusion: Coupling the helicopter vertical displacements with ship heave movements seems to be an efficient strategy to minimize energy at impact. Questions arise on both the rationale and the perceptual invariant behind such behavior and indicate the necessity of further investigation. [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
  Label:
  Group: Ab
  Data: <i>Copyright of International Journal of Aerospace Psychology is the property of Taylor & Francis Ltd and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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        Value: 10.1080/24721840.2020.1862659
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      – Code: eng
        Text: English
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        PageCount: 14
        StartPage: 135
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      – SubjectFull: Helicopter pilots
        Type: general
      – SubjectFull: Helicopter accidents
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      – SubjectFull: Decks (Naval architecture)
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      – SubjectFull: Kinetic energy
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      – SubjectFull: Statistical correlation
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      – TitleFull: Helicopter Pilots Synchronize Their Altitude with Ship Heave to Minimize Energy When Landing on a Ship's Deck.
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              Text: Apr-Jun2021
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              Y: 2021
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