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    Re: The Nautical Day
    From: Joel Jacobs
    Date: 2004 Feb 10, 15:51 -0500

    Reference to the regulations that govern the number of hours a crewman can
    work may be helpful in this discussion. See 46 U.S.C. 8104 et al
    For those interested, use this link to broaden the scope of understanding
    who can work for how long in a given time period. It varies by class of
    vessel, rank, rate, and in port or at sea.
    Joel Jacobs
    ----- Original Message -----
    From: "Trevor J. Kenchington" 
    Sent: Tuesday, February 10, 2004 10:06 AM
    Subject: Re: The Nautical Day
    > Thanks, Doug.
    > So if I have this right, the only thing that runs noon to noon is the
    > writing up of the log. Even that names the half days by the civil
    > calendar, so one sea day (as per the log) could comprise the PM hours of
    > 01-01-03 and the AM hours of 01-02-03 (US style: 02/01/03 in most other
    > countries), for example.
    > That does indeed look like a last vestige of the old practice of using
    > nautical days.
    > As to watch hours: Most of the research ships I have known worked 6-on,
    > 6-off, though I have heard of some working 12-on, 12-off. (Seamen raised
    > in the discipline of the old 4-on, 4-off routine would not recognize the
    > watch as being continuously "on" for 12 hours, of course! That is more
    > like 12 hours less meals, coffee breaks and a fair amount of sitting
    > around between one task and the next.)
    > "Soela" had started with 8-hour watches before my time because the
    > scientific party (used to office hours ashore) found it easier to cope
    > if they had one period of unbroken sleep per day. By the time I was
    > working there, the crew had adopted the same routine even though most of
    > them had grown up with the far more gruelling work schedules of the
    > North Atlantic distant-water trawling fleets. (All except the captain,
    > who stuck with 6-on, 6-off and so forced the mate onto the same
    > schedule.) 8-on, 8-off also meant that we didn't force the same set of
    > guys to stand the graveyard watch every night -- a major concern when
    > you have scientists who are used to spending nights at home and only
    > have two weeks on board to adjust to routines at sea while getting their
    > work done.
    > Trevor
    > You wrote:
    > > Trevor,
    > > I didn't say there was a break in any routine at the beginning or end of
    > > day.The logs start at noon one day and end at noon the next day while
    > > underway or in port.While underway the ships I work on stand either 4
    > > on,4 hrs off or 6 hrs on,6 hrs off continuesly as set by the master(on
    > > Station Bill).Watches while in port have a differant schedule(8 on,8 off
    > > 12 on,12 off).So as examples,say I have the 1st 1200 to 1800 watch
    > > 01-01-03.I have from 1800 to 0000 off 01-01-03.At 0000 to 0600 01-02-03
    > > report back for watch continuesly.If I have the 1st 1200 to 1600
    > > watch I have from 1600 to 2000 01-01-03 off,report for the 2000 to 0000
    > > 01-01-03 watch,have off 0000 to 0400 01-02-03 and report back for watch
    > > to 0800 01-02-03 continuesly.
    > > All the ships' logs are kept on a noon to noon schedule is what I wanted
    > > convey by the ships' day.
    > --
    > Trevor J. Kenchington PhD                         Gadus@iStar.ca
    > Gadus Associates,                                 Office(902) 889-9250
    > R.R.#1, Musquodoboit Harbour,                     Fax   (902) 889-9251
    > Nova Scotia  B0J 2L0, CANADA                      Home  (902) 889-3555
    >                      Science Serving the Fisheries
    >                       http://home.istar.ca/~gadus

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