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Nps Hsv Motion Presentation

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Matsangas & McCauley (2005) - High Speed Vessel (HSV) Motion Effects on Crew Performance: A Preliminary Analysis of Motion Induced Effects (MIE)

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Nps Hsv Motion Presentation

  1. 1. High Speed Vessel (HSV) Motion Effects on Crew Performance A Preliminary Analysis of Motion Induced Effects (MIE) By M.E. McCauley, Ph.D., Naval Postgraduate School Lt P. Matsagas, M.Sc., Hellenic Navy Network Centric Defence Conference 2005 “A Challenge for the Hellenic Armed Forces in the 21 st Century"
  2. 2. Acknowledgments <ul><li>The presented work is funded by: </li></ul><ul><li>Naval Surface Warfare Center Panama City </li></ul><ul><li>(NSWC PC) 110 Vernon Avenue Panama City, FL  32407-7001 </li></ul>
  3. 3. Why this study? <ul><li>NC Operations attributes </li></ul><ul><ul><li>24/7 </li></ul></ul><ul><ul><li>Continuous </li></ul></ul><ul><ul><li>Extensive </li></ul></ul><ul><ul><li>High tempo </li></ul></ul><ul><li>Transformation in Naval Warfare </li></ul><ul><ul><li>Revolutionary designs </li></ul></ul><ul><ul><li>High speed naval platforms </li></ul></ul><ul><ul><li>Reduced manning </li></ul></ul><ul><ul><li>Increasingly complex systems </li></ul></ul><ul><li>Emerging issues </li></ul><ul><ul><li>Need for small reaction times </li></ul></ul><ul><ul><li>Minimized error levels </li></ul></ul><ul><ul><li>Overwhelmingly high stress </li></ul></ul><ul><ul><li>Rapid transitions from daytime to nighttime duty hours </li></ul></ul><ul><ul><li>Extended duty hours </li></ul></ul><ul><ul><li>Rotating work schedules </li></ul></ul>
  4. 4. HSV SWIFT II <ul><li>Main characteristics </li></ul><ul><ul><li>Missions: ASW-SUW-MIW </li></ul></ul><ul><ul><li>Length: 319 ft </li></ul></ul><ul><ul><li>Full Load: 1800 tn </li></ul></ul><ul><ul><li>Speed : >40 kts </li></ul></ul><ul><ul><li>Core Crew: 40 </li></ul></ul><ul><ul><li>Mission modules crew: 25 </li></ul></ul><ul><ul><li>Range: 4300 nm at 30-35 kts </li></ul></ul>
  5. 5. Effects of motion on crew performance The grayed box represents the parameters analyzed in the present work.
  6. 6. Methodology <ul><li>Crew members: 19 </li></ul><ul><ul><li>Male: Eighteen (95%) </li></ul></ul><ul><ul><li>Female: One (5%) </li></ul></ul><ul><li>Data collection period </li></ul><ul><ul><li>10th – 23rd May 2004 </li></ul></ul><ul><ul><li>Transatlantic transiting from Norway to Norfolk </li></ul></ul><ul><li>Sea State </li></ul><ul><ul><li>Mid state 4 to state 5 </li></ul></ul><ul><li>Crew categorization </li></ul><ul><ul><li>Early stoppers: Participation from 11 th till 18 th May </li></ul></ul><ul><ul><li>Normal stoppers: Participation from 11 th till 22 nd May </li></ul></ul><ul><li>Pre-test survey prior to test period </li></ul><ul><li>Test schedule during test period </li></ul>
  7. 7. Pre-test survey Motion Induced Interruptions <ul><li>All participants (100%) reported MIIs onboard HSV </li></ul><ul><li>63% reported that MIIs where “COMMON” </li></ul>Relative frequency of reported types of MIIs.
  8. 8. Pre-test survey Motion Induced Interruptions (cont) Relative frequency of reported MII severity per sea state condition per smoothest 5-minute interval Relative frequency of reported MII severity per sea state condition per roughest 5-minute interval
  9. 9. Test data Motion Sickness Analysis Early stoppers: Test questionnaires mean values per local-time day (vertical bars correspond to MSAQ/ TMSI confidence intervals for the means at a=0.05)
  10. 10. Test data Motion Sickness Analysis Normal stoppers: Test questionnaires mean values per local-time day (vertical bars correspond to MSAQ/ TMSI confidence intervals for the means at a=0.05)
  11. 11. Test data Motion Sickness Analysis Comparison of MSAQ absolute values between Early and Normal Stoppers 2.66 “ Normal” (n=301) 0.016 3.10 “ Early” (n=73) SSS: Sleepiness 11 – 100 19.79 “ Normal” (n=311) < 0.001 11 – 69 35.78 “ Early” (n=75) MSAQ: Sopite Index 11.56 “ Normal” (n=311) 0.005 15.60 “ Early” (n=75) MSAQ: Peripheral Index 11.55 “ Normal” (n=311) 0.037 12.21 “ Early” (n=75) MSAQ: Central Index 12.88 “ Normal” (n=311) 0.004 18.89 “ Early” (n=75) MSAQ: Gastrointestinal Index 11 – 42 13.95 “ Normal” (n=311) < 0.001 11 – 56 20.41 “ Early” (n=75) MSAQ: Total Motion Sickness Index P-value (one-tailed) Range Mean values “ Stoppers” Parameter
  12. 12. Test data Analysis Combined “Early” and “Normal” stoppers. Test questionnaires mean values per local-time day (vertical bars correspond to MSAQ/ TMSI confidence intervals for the means at a=0.05)
  13. 13. Test data MII – MS – Ship motion Analysis Combined “Early” and “Normal” stoppers. Reported MIIRoughest, and MSAQ/ TMSI (local day mean values, vertical bars correspond to MIIs confidence intervals for the means at a=0.05)
  14. 14. Adaptation issues <ul><li>Adaptation in Motion Sickness and Sopite Syndrome </li></ul><ul><ul><li>Two-day period </li></ul></ul><ul><li>No Adaptation Period found for MIIs </li></ul>r=0.62, p=0.058 r=0.38, p=0.224 SMA-30 MSAQ/ SI r=0.83, p=0.003 r=0. 45, p=0.143 SMA-30 MSAQ/ TMSI 13 th – 22 nd 11 th – 22 nd Time periods Parameters under analysis (local day means)
  15. 15. Effects on Crew Performance <ul><li>Sopite Syndrome </li></ul><ul><ul><li>More evident than other MS symptoms </li></ul></ul><ul><ul><li>Ranged from min to max of scale used </li></ul></ul><ul><ul><li>2-day adaptation period found </li></ul></ul><ul><li>Motion Sickness </li></ul><ul><ul><li>Absolute values fairly low </li></ul></ul><ul><ul><li>2-day adaptation period found </li></ul></ul>Morocco to Rota, Spain at the conclusion of exercise African Lion (2004)
  16. 16. Effects on Crew Performance <ul><li>Motion Induced Interruptions </li></ul><ul><ul><li>Significant during sea trials </li></ul></ul><ul><ul><li>Lack of adaptation period </li></ul></ul><ul><li>Participation period </li></ul><ul><ul><li>Mood change </li></ul></ul><ul><ul><li>“ Early” vs “Normal” stoppers </li></ul></ul><ul><ul><ul><li>Significantly larger values of MS, sopite, MIIs </li></ul></ul></ul>
  17. 17. Future Efforts <ul><li>In detail analysis of motion induced interruptions per watch station and sea state </li></ul><ul><li>Effect of motion induced interruptions on task performance </li></ul><ul><li>Evaluation of motion induced fatigue (MIF) onboard HSV </li></ul><ul><li>Comparison of HSV motion effects on crew performance and other operationally correlated naval platforms </li></ul>
  18. 18. Questions <ul><li>? </li></ul>

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