NavList:

Instead of a cocked hat lets consider a boxed hat (azimuths 90 degrees apart) such that squareness is an indicator of symmetrical systematic error. There wouldn't be any real way to know wether the navigator is inside or outside of the box unless the systematic error was large. If the box was a perfect square 10' on a side then most navigators would expect to be inside the box near the center. If the box is small ( 0.5' on a side ) then most likely the navigator would expect to be outside the box. How about using a circle of lets say 1' in radius about the center of the box to indicate an approximate 50/50 chance of being inside the circle.

An asymmetrical rectangle would be an indication of random errors which might mean using a larger circle to represent the 50/50 inside chance.

Greg Rudzinski
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