NavList:

In my opinion, "cocked hats" are most often the result of altitude errors induced by varying horizon conditions due, in the case of stars, to failing light conditions. Although George is obviously textbook correct in his analysis, it is probably more correct to evaluate the individual sights employed, based on the conditions particular to each, and to discard any taken under less favorable circumstances of horizon or otherwise. Generally speaking, to me a large "cocked hat" almost always spelled "mistake" in capital letters, and was viewed with suspicion, not technically analyzed.

 

Regards,

 

Henry

 

Robert responds,

 

Henry can you take this a step further and tell me: in your experience, is it really necessary -- for purposes of practical navigation at sea -- to consider the statistical inaccuracy of assuming your fix in the centre of the cocked hat/smudge, whatever you want to call it?

 

Robert

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