encoding  utf-8
survey W1

centreline
cs OSGB:ST
date 1978 04 08

data normal from to compass clino tape ignoreall
declination 0 degree
#added to override automatic date correction.
calibrate compass +6.833
station 79 "" entrance
fix 79  50485 55637 237.5
#79 is centre of lid of Waterwheel Swallet

79  80  -  down  4.36
80  81  147.66  -4.33  3.33
81  82  118.00  8.58  7.82
81  83  265.00  -59.58  3.80
83  84  146.50  -12.25  3.20
84  85  -  down  1.52
85  86  181.00  9.00  0.70
86  87  206.00  -45.00  3.99

endcentreline
endsurvey W1