AI Article Synopsis
- A study examined work and sleep patterns of 141 commercial marine workers over 10-30 days, focusing on their schedules, sleep timing, and levels of fatigue.
- Watchstanders using a 4-on, 8-off schedule experienced significant sleep disruption, averaging only 6.6 hours of sleep, often in fragmented periods lasting less than 5 hours.
- Critical fatigue levels varied from 1-24%, with watchstanders on the 04:00-08:00 shift getting less than 4 hours of sleep 22% of the time; the study suggests potential changes in scheduling and staffing to address these issues.
Article Abstract
A field study of work and sleep patterns among commercial merchant marine personnel is reported. Data collected over a 10-30-d period from 141 subjects aboard eight ships included information concerning work-rest schedules, sleep timing, alertness on the job and critical fatigue. The data indicate that watchstanders on the 4-on, 8-off schedule show considerable disruption in their sleep. The average sleep duration for all mariners is 6.6 h; watchstanders obtain their sleep in fragmented periods that are frequently less than 5 h in duration. Analysis of critical fatigue shows an incidence of 1-24% across personnel and measures. Of particular concern are the watchstanders on the 04.00-08.00 schedule, who sleep less than 4 h per 24-h period 22% of the time. Potential countermeasures, including changes in scheduling and staffing are proposed.
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| http://dx.doi.org/10.1111/j.1365-2869.1997.00245.x | DOI Listing |
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