encoding utf-8 survey Aven centreline date 2011 team "Robin Sheen" #to find the height AOD of the aven at the end of No Mercy data normal from to tape compass clino ignoreall #station 1 is final survey station of 1971 survey flags duplicate 1 2 7.2 200 0 flags not duplicate 2 3 18.2 002 80 endcentreline endsurvey