Built Channel under Tank. Water Channel ... ΝΝ-6 1183, 1184 ΝΝ 1053 ST 315 ΝΝ 762 P 15184 ΝΝ 685 ST 304 ΝΝ 686 L 3761 ΝΝ 669 SS 8882 ΝΝ 670 S 1156 ΝΝ 671 SS 8883 ΝΝ:1939.0511:7 N 36980 ΝΝ:1939.0511:11 N 36984 ΝΝ:1939.0511:12 N 36985 ΝΝ:1939.0511:15 ... 11 May 1939