encoding  utf-8
survey R7

centreline
cs OSGB:ST
date 1969 10 15
#Source WIS survey book 2 pp63/4

data normal from to compass clino tape ignoreall
units tape feet
#calibrate compass +8.16
calibrate compass -0.33
#altered to allow for automatic mag dev correction

471  472  289.33  -27.0  7.0
#471 drillmark on east wall 4' up 2' below roof
472  473  284.66  0.5  10.4
473  474  261.33  -8.5  20.2
474  475  257.00  -23.75  12.8
475  476  169.5  -30.33  23.5
476  477  216.66  -28.0  25.3
477  478  194.83  -12.66  32.6
478  479  186.83  -16.83  40.5
479  480  178.16  -12.0  40.5
480  481  264.33  -16.33  24.6
481  482  189.5  -5.25  24.3
482  483  142.83  12.5  24.2
482  484  221.66  -37.5  20.3
484  485  187.00  -20.5  18.3
485  486  219.66  -14.66  17.0
#486 centre of head of upper bolt holding chain

endcentreline
endsurvey R7