Labels:barrier reef | keyboard | windowpane OCR: Signal D1 100 100 0.4 030 Signal 2 120 400 1.00 1.43 H 0,5 044 030 D.16 CCIT1 Note In full field tert signals. each tread of the staircase may have a duration of 8.66 S. FIGIRE A-7/N.73 Sigral D for 625-linc circuits Jine