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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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