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Crew Size and Maritime Safety (1990) / Chapter Skim
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Appendix E: Previous Research on Shipboard Task Analysis
Pages 126-131

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From page 126...
... used task lists, operations sequence charts and multiple activity tables, qualified by ships' visits and shipboard interviews to validate their findings. Some empirical data were used in the study, primarily preliminary Navy preventive maintenance system (PMS)
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From page 127...
... Williams used two vessels the SS American Lancer and the MV Sugar Islander as baseline vessels, and performed task analyses using multiple activity charts to determine deck engine and steward department manning levels. Williams calibrated his engine department findings with preventive maintenance system (PMS)
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From page 128...
... Boatswain 3 ABs 2 OSs 1 Chief Engineer 2 Assistant Engineers 2 QMEDs 1 Wiper 1 Chief Steward 1 Chief Cook 1 Cook/Baker 3 Messmen 2 Utility Men TOTAL 11 6 8 25 * Additional manning reductions (to 22 people)
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From page 129...
... This cooperative program between the government and PGM used organizational and work assessment techniques- interviews, meetings, questionnaires, organizational analyses, time and motion analyses, daily activity logs, and "day in the life of" sessions to determine PGMs shipboard and shoreside work planning, work distribution, equipment maintenance, and requisite manning. Denny recommended maintenance of the present ship's complements of 20 personnel, and recommended institution of an onboard maintenance department, development of a shipboard management team, a combined navigation/communications watch (eliminating the need for a radio officer in the future)
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From page 130...
... The Bridge 9/one-man watch navigational performance (measured by deviation from a centerline course) was found to be superior to the other two bridge designs evaluated; path width remained within safe limits 95 percent of the time, in contrast to the two-handed conventional bridge, which resulted in safe path widths only 50 percent of the time.
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From page 131...
... Manning issues were one piece of the analysis, and were integrally tied to the bridge designs tested. Schuffel determined that a single-manned, advanced technology bridge was safer and more efficient (as measured by the trackkeeping and mental workload parameters)
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Key Terms

  • bridge designs
  • stanwick corporation
  • conventional bridge
  • task analyses
  • task analysis

  • hotel services
  • gas turbine
  • integrated bridge
  • preventive maintenance
  • crew skills

  • denny recommended
  • bulk oil
  • empirical data
  • navigational performance
  • manning requirements

  • liverpool polytechnic
  • bridge design
  • multiple activity
  • optimal manning
  • performed task

  • path widths
  • safe limits
  • sugar islander
  • maintenance department
  • bridge manning

  • central emergency
  • moderately successful
  • work assessment
  • differential subsidies
  • emergency response


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