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<DIV>As it was a test file I forgot to copy my normal statements across.</DIV>
<DIV>I tend to use a line like</DIV>
<DIV> </DIV>
<DIV>declination xx degrees # xx.x degrees (based on Grid Bearing of 18.5
deg to Llangattock Church)</DIV>
<DIV> </DIV>
<DIV>to show the location of the calibrated bearing we have used. This line was
set out over 40 years ago and most of the calibrations have been an average of 6
or so readings taken. I have now adapted a tripod so I can calibrate the distox
on the same line. (most tripods have quite a bit of iron in them, so replace all
with suitable non magnetic nuts and bolts, discarding any springs etc.)</DIV>
<DIV>I have been taking calibration in each orientation of the distox, rotating
one way then the other to get 8 hopefully similar readings. Then average to
produce</DIV>
<DIV> </DIV>
<DIV>declination -1.8 degrees # 20.31 degrees (based on Grid Bearing of
18.5 deg to Llangattock Church)</DIV>
<DIV>calibrate compass 0.9280 # meridian convergence for
OSGB:SO location</DIV>
<DIV> </DIV>
<DIV>with the actual calibration readings in with the cave survey data but
commented out.</DIV>
<DIV> </DIV>
<DIV>Maybe this is more how to use the distox and pda than Therion</DIV>
<DIV> </DIV>
<DIV>John</DIV>
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<DIV style="font-color: black"><B>From:</B> <A title=lists@group-s.sk
href="mailto:lists@group-s.sk">Stacho Mudrak</A> </DIV>
<DIV><B>Sent:</B> Thursday, October 11, 2012 4:48 PM</DIV>
<DIV><B>To:</B> <A title=therion@speleo.sk href="mailto:therion@speleo.sk">List
for Therion users</A> </DIV>
<DIV><B>Subject:</B> Re: [Therion] Declination and the cs
command</DIV></DIV></DIV>
<DIV> </DIV></DIV>
<DIV
style="FONT-STYLE: normal; DISPLAY: inline; FONT-FAMILY: 'Calibri'; COLOR: #000000; FONT-SIZE: small; FONT-WEIGHT: normal; TEXT-DECORATION: none">Do
you mean adding some option, that would specify, that given declination is not
against true but grid north?
<DIV> </DIV>
<DIV>S.</DIV>
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