Backsights and default accuracy estimatesZ

[John Halleck]

On Fri, 31 May 2002, Martin Green wrote:

> Date: Fri, 31 May 2002 10:35:42 +0100
> From: Martin Green <mjg54@cam.ac.uk>
> To: John Halleck <John.Halleck@utah.edu>
> Cc: survex@survex.com
> Subject: Re: Backsights and default accuracy estimates
> 
> Hi,
> I did not intend to claim that BCRA grade 5 did specify that fore sight back
> sight inaccuracies should be with in a degree.  Only that each reading

  I assume you mean descrepancies, not inaccuracies.
  (The sight accuracies should be within a degree for sure...  it is
  the descrepancies that are the issue.)

> should be within a degree.  I am not sure if there are any special
> considerations for fore and back sights made by the BCRA.  I have not
> managed to find the definitions on the web.
> Martin
>