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    Log keeping
    From: Jeremy C
    Date: 2009 Jul 29, 02:39 EDT
    As an aside to this, "Taking departure" is still done this way on the merchant ships I've sailed on.  Departure is useful to begin the "passage" from which consumption and distances are computed and it is still relatively arbitrary.  They are still marked in both the log book and bell book as a distance (usually obtained by radar) and bearing (ditto) as well as a GPS Lat and Long.
     
    Passage planning as a whole is very detailed these days. Generally a waypoint is marked as a departure point, but traffic and other considerations may make the actual point of departure quite different than the planned waypoint.
     
    Voyage planning, chart and pub corrections, and execution of the voyage plan are the primary jobs of the navigator these days.
     
    As far as plotting sheets are concerned, this has nothing to do with taking departure (or conversely arrival) in modern voyages.  We are usually well onto charts before arrival is actually taken, even from ocean passages.  Recently, on this ship, we take arrival just shy of the pilot station, so we have been off of the plotting sheets for some hours.  A good example of this is my last arrival into Diego Garcia, which is an island in the middle of nowhere.  We hit the chart at 0420 and took arrival at about 0900.  I had first radar and then visual landfall by 0500.
     
    Jeremy


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