TY  - JOUR
PY  - 2023//
TI  - How much can we improve two-section watch bills? Sleepiness, fatigue, and psychomoter vigilance performance during naval operations in the 6/6 and 7-5-5-7 watch bills
JO  - Proceedings of the Human Factors and Ergonomic Society annual meeting
A1  - Röttger, Stefan
A1  - Giesche, Melanie
A1  - Abendroth, Johanna
A1  - Jacobsen, Thomas
A1  - Matsangas, Panagiotis
A1  - Shattuck, Nita Lewis
SP  - 1273
EP  - 1278
VL  - 67
IS  - 1
N2  - A traditional two-section watch bill (6 hours on / 6 hours off, starting at midnight - "6/6") and a two-section watch bill better adapted to the human circadian rhythm (watches of 7, 5, 5, and 7 hours duration, starting at 3 a.m. - "7-5-5-7") were trialed on two vessels of the German Navy with 67 study participants in a crossover design. Questionnaires were used to assess subjective sleepiness (ESS, KSS) and subjective fatigue (FSS). The psychomotor vigilance task (PVT) was self-administered with wearable devices before and after each watch. Over the course of seven days at sea, PVT performance worsened significantly with the 6/6, but not with the 7-5-5-7 watch bill. In the 6/6 watch bill, number of participants with excessive sleepiness and high levels of fatigue was higher than in the 7-5-5-7 watch bill although not at a statistically significant level. Marked differences between watch bills in crew performance started to emerge after 6 days.<p />  <p>Language: en</p>
LA  - en
SN  - 2169-5067
UR  - http://dx.doi.org/10.1177/21695067231192909
ID  - ref1
ER  -