Accession Number : ADA102831


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


Descriptive Note : Technical rept. Jul 1975-Apr 1976


Corporate Author : NAVAL AEROSPACE MEDICAL RESEARCH LAB DETACHMENT MICHOUD NEW ORLEANS LA


Personal Author(s) : Thomas, D J ; Majewski, P L ; Guignard, J C ; Ewing, C L


Full Text : https://apps.dtic.mil/dtic/tr/fulltext/u2/a102831.pdf


Report Date : May 1977


Pagination or Media Count : 53


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.


Descriptors :   *STRESS(PHYSIOLOGY) , *SHIP MOTION , *MOTION SICKNESS , MATHEMATICAL MODELS , COMPUTERIZED SIMULATION , SIMULATORS , CREWS , PHYSIOLOGICAL EFFECTS , HABITABILITY , SURFACE EFFECT SHIPS , SHIP PERSONNEL , PROFILES , SIMULATION , PERFORMANCE(HUMAN) , HEALTH


Subject Categories : Stress Physiology


Distribution Statement : APPROVED FOR PUBLIC RELEASE