encoding utf-8 survey sheppards_crook centreline date 2005.09.17 #date taken from Somerset Sump Index data normal from to gradient bearing length ignoreall SC1 SC2 +4 102 10.5 SC2 SC3 +10 068 14.5 SC3 SC4 -8 164 4 ; SC4=dive line tie off endcentreline endsurvey sheppards_crook