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    Re: from a watcher
    From: Robert Eno
    Date: 2002 Oct 17, 21:46 -0400

    Mr. Weilacher,
    
    You are truly a PRACTICAL navigator. I like your style.
    
    Robert Eno
    
    ----- Original Message -----
    From: David Weilacher 
    To: 
    Sent: Thursday, October 17, 2002 9:10 PM
    Subject: Re: from a watcher
    
    
    > I teach this stuff in my spare time and know that some of what I advocate
    will
    > be frowned on by our learned collegues here.  But here is a different
    view.
    >
    > You need a universal plotting sheet.  Set this up before you leave.  Keep
    it
    > below.  Keep your DR on this one.  You need to set up some extras to work
    > sights on.  Keep these below also.
    >
    > Only take two books with you, The nautical almanac and the one volume of
    the
    > sight reduction tables you require.
    >
    > Take lined tablet paper.  Throw out the proformas.
    >
    > Stick with just the sun for awhile.
    >
    > Before you go again, practice writing the following on your paper.  You
    need
    > to memorize this.  (and what it means)
    >
    > DR-Lat
    > DR-lon
    >
    > W-time
    > W-error
    > ZT
    > ZD
    > GMT
    > G-date
    >
    > HS
    > Ic
    > Dip
    > Ha
    > Mc
    > Ho
    >
    > GHA-h
    > GHA-ms
    > sum
    > SHA/v
    > GHA
    > AP-lon
    > LHA
    >
    > Decl
    > d__  d-corr
    > Decl
    >
    > AP-lat
    > Decl
    > LHA
    >
    > Hc
    > d
    > Z
    > Zn
    > Lop
    >
    > Hc
    > d-corr
    > Hc
    >
    > Ho
    > Hc
    > T/A
    >
    > AP-Lat
    > AP-Lon
    > T/A
    > Lop
    >
    >
    > (Did this from memory BTW.)
    >
    > Short cuts:
    >
    > Look at little d at bottom of column.  Usually not big enough to mess
    with.
    >
    > Keep an accurate watch on GMT and you can skip all of the watch stuff.
    >
    > Use a standard height of eye for your boat and don't worry about the error
    a
    > couple feet either way will cause.
    >
    > Skip the little d's if they look like they are little corrections.
    >
    > Never mess with the z correction because a 1 degree error here won't make
    an
    > error of 1 mile at 60 nm from intercept.
    >
    > Only take multiple sights if you aren't happy with the one you took.
    After
    > you reduce it, if you are off more than 10% of your distance  travelled
    since
    > last fix, you should take another.
    >
    > Or take multiples, then reduce the one(s) that felt best.
    >
    > Also.  Only use pencil and paper.  Four function calculators don't gain
    you
    > that much and you really do get better through practice.
    >
    > When ashore, do pencil arithmetic on other things.  If you learn your
    skills
    > ashore, when you get to sea, you'll have easy days. Besides, people think
    you
    > are a weird sort of cool when they see you working a pencil.
    >
    >
    >
    >
    >
    > On Wed, 16 Oct 2002 13:06:22 +0100 martinhall  wrote:
    >
    > > Clean
    > >   Clean
    > >   DocumentEmail
    > >
    > >   MicrosoftInternetExplorer4
    > >
    > >
    > >
    > > st1\:*{behavior:url(#default#ieooui) }
    > >
    > >
    > >
    > >
    > >
    > >
    > >
    > >  /* Style Definitions */
    > >  table.MsoNormalTable
    > >         {mso-style-name:"Table Normal";
    > >         mso-tstyle-rowband-size:0;
    > >         mso-tstyle-colband-size:0;
    > >         mso-style-noshow:yes;
    > >         mso-style-parent:"";
    > >         mso-padding-alt:0cm 5.4pt 0cm 5.4pt;
    > >         mso-para-margin:0cm;
    > >         mso-para-margin-bottom:.0001pt;
    > >         mso-pagination:widow-orphan;
    > >         font-size:10.0pt;
    > >         font-family:"Times New Roman";}
    > >
    > >
    > >
    > >
    > >
    > >
    > >
    > >
    > > Hi
    > >
    > > I have watched this list for some time now
    > > avidly reading and trying to absorb all the
    > > information passed on it.
    > >
    > > Last year I took the RYA offshore nav
    > > course but have problems implementing the
    > > content.
    > >
    > > I only have a very small boat and do most
    > > of my sailing in the Bristol
    > >  channel.
    > >
    > > I can get what I hope is a good sight now
    > > and then but find I need to carry far to many
    > > books, almanacs and proformas
    > > with me?
    > >
    > > By the time I have looked up the
    > > information needed and filled in the proformas
    > > everything is wet and falling
    > > apart.
    > >
    > > I do sometimes take my laptop but battery
    > > power is a problem. Can anyone tell me the best
    > > system to use on a small boat
    > > with limited resources on board
    > >
    > > (please don't
    > > say use a gps all the local boat clubs keep
    > > telling me that. I have one but I want
    > > to do it the proper way)
    > >
    > > Also is there any good share wear out
    > > there that can produce daily tables (I have one
    > > but it gives different results
    > > to my yearly almanac).
    > >
    > > Thanks in advance
    > >
    > >
    > >
    > >
    > >
    > > Martin Hall
    > >
    > >
    >
    >
    >
    > Dave Weilacher
    > .US Coast Guard licensed captain
    > .    #889968
    > .ASA certified sailing and celestial
    > .    navigation instructor #990800
    > .IBM AS400 RPG contract programmer
    >
    >
    
    
    

       
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