Sleep, duty, relation, ship
There are numerous patterns out there for establishing a watch schedule
for ships at sea, with names like “The Swedish System” and the “Five and
Dime”, all of which are trying to solve the problem of allocating
shifts of people in continuous 24-hour operation. These systems are
informed by the tasks required by time of day and what little we
understand about sleep and the human psyche. This is a question that you
will have to confront if you go out on a boat to sea, and what you find
may not be what you expect.