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> Alex wrote:
> "I don't see any problems with  height of the eye when observing
> on a beach:-) Just stand or sit on the edge  of water and know your own
> height, standing or sitting."

And Frank replied:

> Picture,  for example, a road running along a rocky shore. You're
> maybe 20 or 30 feet  above the water level,

I would not call such setting a "beach".
The original question was about a beach:-)

> and there's a jumble of
> boulders below

Sure, there are some difficult settings for the height of the eye.
One list member described recently his house standing on
top of a hill in the middle of an island...

It depends on the circumstances, of course.
From the top of a mountain in the middle
of an island I would try to take altitudes
of something in the opposite directions
(if horizon in opposite directions is available).
Possibly by back sights.

Yesterday, I tried a back sight of the Sun for the first time.
My pocket sextant has an unusually long scale up to 150d.
The Sun was at 45d. What I discovered is that my hair
on the top of my head obscure the Sun somewhat...
because my pocket sextant is very small, so that the index mirror
is too close to my face.
(So I had to wet and comb my hair). The sight was within 1'
as it almost always happens with my pocket sextant, which reads
to 1'.
45 degrees is probably the lowest altitude that I can measure with
a back sight with this sextant.

Alex.



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