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Sara and Dan schrieb:
> I am new to this navlist and any help would be appreciated.
>
Welcome at NavList.
>
> My problem is that since I am not traveling in a straight line at a
> constant speed it is not possable to calculate a
> dead reckoning point.
>

St Hillaire is an iterative algorithm.
So if you use any coordinates at just the right hemisphere you will get
a fix nearer to your true position. Using this as your corrected D.R.
and computing another iteration gives you again a better fix.

>
> My thought is that there ought to be a way to get accurate enough
> coorinates by taking several noon sightings of the sun, graphing them
> and picking the highest point and using this time as local apparent noon
> to get longitude and using
> the observed altitude to get latitude.  If  I take these coordinates and
> use them as my dead reckoning position for later
> readings I think that this would yeald fairly accurate results.
>
You are right here.
Even tough it is not possible to get the exact time of the culmination
by observation, it will provide you with coordinates accurate enough for
a fairly precise D.R.

Merry Chrismas,
    Thomas.



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