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On Thu, 08 Jan 2009 14:03:52 -0700, Nicol�s de Hilster  
 wrote:

> Later on I have been on projects where either station
> pointers or 'circle charts' were used to solve the position. A circle
> chart looks similar to a Decca chart, but now covered with circles that
> resemble the angles measured.

Are "circle charts" clear overlays for the coastal charts?  Do you center  
one on each reference landmark, and find the proper intersecting angle  
lines by eye?

I have a couple of vague ideas of how that may work, but I could be off on  
the wrong track altogether.

For a different approach, cheap station pointers might be made of three  
clear plastic disks, joined by a hollow rivet at the center, and graduated  
on the outer periphery in degrees.  Each disk would have one axial line  
pointing to its zero degree mark.

However, I much prefer the workmanship in your real station pointers /  
three arm protractors.  Thanks for posting photographs of them.

-- 
Richard . . .

Using Opera 9.2.4 after the "Dog" died

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