;BCRA Grade 3 specification file ;tape error *SD tape 0.15 metres ;95% of readings are within 0.5m (3 S.D.) ;compass error *SD compass 3.33 degrees ;95% of readings are within 10 degrees (3 S.D.) ;clino error *SD clino 3.33 degrees ;95% of readings are within 10 degrees (3 S.D.) ;station position error *SD position 0.15 metres ;95% of positions are within 0.1m (3 S.D.)