"Capt. JG" wrote in message
news:6bmdnauSu96riJDVnZ2dnUVZ_hmtnZ2d@bayareasolut ions...
wrote in message
...
On Mon, 21 Apr 2008 14:10:51 -0700, "Capt. JG"
wrote:

"Jeff" wrote in message ...
Capt. JG wrote:
"Jeff" wrote in message ...
Capt. JG wrote:
...
The disadvantage is that each position depends upon the previous
one,
so that small errors may build up to be large ones.
No, you can go a number of days referencing the last fix.

Don't understand... yes, you can go a number of days, but after that
it
seems to me it would start to get way off.

If you start with a fix, you don't accumulate error each day, only when
you change stars. In other words, as long as you can use the same set
of
stars, you only have one sight's worth of error. In theory, if you
have a
large number of stars, you can go quite a while, since three good LOPs
would count as a new fix.


Yes, absolutely. My point was that 1) you're going to have to use
multiple
sets and 2) if you're inaccurate in your observation, this will translate
into larger and larger errors later.... well, unless you only make one
error.

I think the typo in the subject line is making more and more sense. :')

Heh... and apparently no one else noticed it.



What a twit!

Only those with self-imposed blinders in the form of kill files didn't
notice where I picked up on it and called you an idiot on day one.

Wilbur Hubbard