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Subject: Re: from a watcher
From: Dan Allen (danallen46@XXX.XXX)
Date: Thu Oct 17 2002 - 21:52:56 EDT
On Thursday, October 17, 2002, at 06:10 PM, David Weilacher wrote:
> Take lined tablet paper. Throw out the proformas.
> Stick with just the sun for awhile.
I agree with these two observations.
BTW, I do not frown on using a universal plotting sheet, nor do I
consider myself learned. Other than one Coast Guard costal navigation
class I took years ago, I am self taught with regard to navigation.
Of course I was a math & physics major in college, so I tend to enjoy
the math & physics of it all. Using a calculator helps me concentrate
on the actual physics and formulas behind navigation, but if you take
joy in using tables, by all means do it.
> Only take two books with you, The nautical almanac and the one volume
> of the
> sight reduction tables you require.
Note that the US nautical almanacs have a set of sight reduction tables
in them already so you actually only need one the volume if you do not
have a strong preference for a different set of tables. Here again the
whole point of sight reduction is solving one formula:
cos(c) = cos(a)*cos(b) + sin(a)*cos(b)cos(ab)
I did it by memory! ;-)
Dan
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