Instrumentation & Measurement Magazine 24-4 - 86

state since individuals' circadian rhythm and sleep patterns
can have a big impact in the MF state during specific periods of
the day. Before the experiment we made sure the participants
were aware of all aspects of the simulated task and data collection
and their informed consent was obtained. We also ensured
that our experiment closely followed the guidelines of the Declaration
of Helsinki.
Results and Discussion
Fig. 4. Perceived KSS level for each test subject, from the beginning to the
end of the experiment.
During the multi-subject and multi-task experiments we included
different navigation exercises, with varying distances,
duration, and vessel sizes. In each exercise we had between
two and three participants in the bridge at the same time. There
was always a pilot and a navigator, and in the cases in which
we had three participants, the third one was responsible for
communicating with other vessels and the control center. In
each case, we monitored either the pilot or the navigator. The
Fig. 5. Results for each test subject, showing MF level distribution, MF score and KSS levels.
86
IEEE Instrumentation & Measurement Magazine
June 2021

Instrumentation & Measurement Magazine 24-4

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