Geoffrey,

Thanks.

The formula for the asimuth in NA seems a little

more complicated than the one

taught by PE. I don't know what is the reason for this more complicated

formula.

All Russian books use even simpler formula:

sin
A=(cos Lat sin LHA)/cos h.

where A is the asimuth, h is the altitude.

That's what I use.

It requires 3 inputs of angles to the calculator (without memory) while PS

requires 5

and NA requires 6.

There are also modified Russian formulas optimized for the calculator with

one memory cell (like Casio f250), however I do not use them, because

they compute asimuth first and altitude second, while I need

only altitude in most cases for land observations.

Alex.

On Sun, 8 Apr 2012, Geoffrey Kolbe wrote:

>

> At 16:08 08/04/2012, you wrote:

>

>> I would like to follow this discusion,

>> But what is the formula (for the calculator) taught by the Power Squadron?

>> Can anyone give me a link with this formula?

>

> <

http://www.akronpowersquadron.com/NauticalTools/SightReduction/SightReduction.shtml>

http://www.akronpowersquadron.com/NauticalTools/SightReduction/SightReduction.shtml>

>

>> (I know two formulas for sight reduction).

>

> Why Alex, there is a world of excitement waiting for you then. ;-)

>

> Geoffrey

>

>

>

>

>

> View and reply to this message:

http://fer3.com/arc/m2.aspx?i=118813>

>

>