| Document ID (ISN) | 105072 |
| CIS number |
06-730 |
| ISSN - Serial title |
1136-6532 - Medicina Marítima |
| Year |
2004 |
| Convention or series no. |
|
| Author(s) |
Tirilly G. |
| Title |
The impact of fragmented schedules at sea on sleep, alertness and safety of seafarers |
| Original title |
El impacto de las jornadas fragmentadas en la mar sobre el sueño, la capacidad de alerta y la seguridad de los marinos [in Spanish] |
| Bibliographic information |
Dec. 2004, Vol.4, No.2, p.96-105. Illus. 15 ref. |
| Abstract |
Most work schedules at sea rely on the watchkeeping system. This study examines the work/rest rhythm among seafarers and its effect on sleep and alertness. Two studies were conducted, one aboard a trawler and the other on an oceanographic vessel. Results indicate that sleep is fragmented into 2-3 episodes on the oceanographic vessel and 5-6 episodes on the trawler. Despite the fragmentation of the sleep, the 24h alertness rhythm was maintained, although with an impairment at night and a pronounced dip in the afternoon (coinciding with the need for a nap). The decreased alertness being linked to a much higher risk of accident, this risk factor is elevated at night. However the study shows that numerous work- and environmental-related factors play an important role in maintaining alertness level and have to be taken into account when addressing safety at sea. |
| Descriptors (primary) |
deep-sea fishing; work-rest schedules; vigilance; sleep deprivation |
| Descriptors (secondary) |
subjective assessment; relaxed vigilance; survey; circadian rhythm |
| Document type |
D - Periodical articles |
| Country / State or Province | France |
| Subject(s) |
Ergonomics and work organization
|
| Broad subject area(s) |
Physiology, ergonomics
|
| Browse category(ies) |
Fishing
Vigilance
Fatigue
|
