sand-banks which lies 8.1 nautical miles from the German mainland between Bremerhaven and Cuxhaven. It extends from 8°i8'E to 8°29'i5"E and from 5 3 V ' i 8 " N to 5 3°46'i5"N. Robins Balje is a natural boundary on the south-west side, while the north-eastern and southern boundaries are formed by the Neu-Cappeler Tief and the Dorumer Tief (Fig. 1). The highest rise above normal mean tide (1-2.2 ...

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