NavList:

-------------- Original message from Alexandre E Eremenko <eremenko@MATH.PURDUE.EDU>: --------------


> Dear Joel,
> Thank you for your comments.
> Here are some pictures illustrating my report:
> 1. My preferred observation position:
> http://www.math.purdue.edu/~eremenko/sailing/sext.jpg
> (I try to be as close as possible to the center of
> the ship rolling/pitching/yawing)
> 2. Attempts to photograph the waves:
> http://www.math.purdue.edu/~eremenko/sailing/waves1.jpg
> http://www.math.purdue.edu/~eremenko/sailing/waves2.jpg
> (The waves never look as impressive on a photo as they are
> in reality:-(
> 3. Typical weather during the trip:
> http://www.math.purdue.edu/~eremenko/sailing/alex2.jpg
> 4. But sometimes it was like this:
> http://www.math.purdue.edu/~er! emenko/sailing/karina.jpg
> http://www.math.purdue.edu/~eremenko/sailing/sail1.jpg
> for example, on the day when I managed to calibrate my Bris
> sextant (details on this sextant and my trials of it will
> follow in a later message)
> 5. The boat (moored in Cowes) and its crew:
> http://www.math.purdue.edu/~eremenko/sailing/karin2.jpg
>
> > Also the limitations of the inverting scope in rough going.
>
> With some experience and a good
> helmsman it is perfect. I still tend to use it under all conditions,
> though my straight one is OK too, especially after Freiberger put
> some grease in it. If I had to choose only one scope, there is no doubt
> that I'd choose the inverting one.
>
> > I always
> > took the sight standing and from the crest of a wave never the trough.
>
> The boat I traveled in was a pretty large "small boat", 42 feet! long.
> So my sitting position on the top of the cabin roof was high enough.
>
> I always took the sight from the crest of a wave, otherwise the horizon
> is simply not vizible, as you can see on picture
> http://www.math.purdue.edu/~eremenko/sailing/waves1.jpg
> which was
> taken in standing poisition from the cockpit.
>
> Alex.