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The NA Table of Increments & Corrections does not change from year to
year. So if you have any year's almanac you have the table.

Since the table is a 60ths multiplication table; you can get what
you're looking for with a calculator. For instance, The sun's GHA
moves 15* per hour, so in 30/60th (one half-hour) the change is 7.5�
or 7� 30'. Looking in the table, I see that in 11 minutes of time the
change in the sun's GHA is 2� 45' (11/60 X 15� = 2.75� = 2� 45') Some
calculators can work with degrees and minutes and save you the extra
step of converting decimal parts of a degree to minutes.

The table works the same way for Aries and the moon except their
hourly rates are different. The moon's GHA change in an hour is 14�
19.0' and Aries' is 15� 02.5'.

The rate for the moon is an adopted rate to which you have to add the
"v" adjustment to account for the actual rate at which it's GHA is
changing during any given hour.

The planets' basic GHA change is the same as the Sun's but like the
moon there is a "v". For Venus it can be negative. For the moon "v" is
always positive.

The table works the same way for the hourly changes in declination
("d" in the almanac) of the sun, planets and moon.

-Hewitt

On 3/30/09, NavList@fer3.com  wrote:
>
>  I am attempting to work through a sight reduction exercise (Silicon Sea Leg 
11)at my desk during my lunch break.  I have H.O. 229 here at the office, but 
no Nautical Almanac, so I am using the online Almanac at www.tecepe.com.  I 
just discovered that the online Almanac does not include a table of 
increments for the minutes and seconds of GHA.  Two questions:
>
>  Does anyone know of an online copy of the table of increments?
>
>  Does the table vary from year to year, or are the increments for minutes 
and seconds always the same, so that the table in a 2009 NA could be used for 
a problem that uses the 1996 NA?
>
>  Thank you,
>  John Parsons
>  ---------------------------------------
>  [Sent from archive by: jkp-AT-obec.com]
>
>
>  >
>

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