Effects of Simulated Surface Effect Ship Motions on Crew Habitability. Phase II. Volume 5. Clinical Medical Effects on Volunteers

Abstract

From July through September 1975, a series of ship motion simulation experiments was conducted using the ONR Motion Generator at Human Factors Research, Inc., Goleta, California. The motions were based on the mathematical model for the 2000 ton surface effect ship (2000T-SES). Nineteen volunteer human research subjects, selected at different times from 600 naval enlisted recruits, briefed on NAMRL Detachment research, were exposed to several motion profiles. These subjects were extensively evaluated before acceptance. Those with any medical defects which would place them at extra risk of injury while undergoing biodynamic experiments were excluded. Those with anomalous vestibular response were also excluded. The motions to be experienced were those predicted for a 2000T-SES running in a bow quartering sea in 3 separate conditions: (1) sea state three at 80 knots; (2) sea state four at 60 knots; and (3) sea state five at 40 knots. The subjects were to be run in pairs for 48 hours in each of the three conditions. Performance tasks representative of shipboard activities were administered on a prescheduled basis. The 48-hour motion condition periods were alternated with 48-hour static control periods and 24-hour rest periods. The experimental design called for 12 subjects assuming no voluntary withdrawals. A total of 19 subjects was used, primarily because of volunteer withdrawals following continued emesis. Substantial alternations of the design also occurred due to operational problems with the simulator. For a variety of reasons many runs were undertaken with attenuation of the motion either by a percentage amount or to a selected rms acceleration level.

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Document Details

Document Type
Technical Report
Publication Date
May 01, 1977
Accession Number
ADA102831

Entities

People

  • C. L. Ewing
  • D. J. Thomas
  • J. C. Guignard
  • P. L. Majewski

Organizations

  • Naval Aerospace Medical Research Laboratory

Tags

Communities of Interest

  • Biomedical

DTIC Thesaurus Topics

  • Chemical Synthesis
  • Chemistry
  • Health Services
  • Hearing Disorders
  • Hearing Loss
  • Measurement
  • Medical Personnel
  • Motion Sickness
  • Plastic Explosives
  • Signs And Symptoms
  • Simulations
  • Spine
  • Surface Effect Ships
  • Therapy

Readers

  • Brain and Cognitive Science; Experimental Psychology; Cognitive Neuroscience
  • Marine Hydrodynamics