;BCRA Grade 5 specification file ;tape error *SD length 0.033 metres ;95% of readings are within 0.1m (3 S.D.) ;compass error *SD bearing 0.33 degrees ;95% of readings are within 1 degree (3 S.D.) ;clino error *SD gradient 0.33 degrees ;95% of readings are within 1 degree (3 S.D.) ;station position error *SD position 0.033 metres ;95% of positions are within 0.1m (3 S.D.)