Jahresbericht Hr.11/1956 
- Seite 78 - 
the Schmal-Tief. The three latter surveying tasks could not quite be concluded. 
The Becca method, operated partly with two navigator equipments, was suc 
cessfully applied for the survey of the outer sea area off the isle of Juist 
up to Wangerooge, of the Steingrund and the outer part of the Aufleneider. 
Within the compass of the above mentioned survey work the mean high water 
line was fixed by levelling on "Alte Mellum"; on the Düne of Helgoland; on 
Kniepsand; and in the eastern part of Baltrum as well as in the western part of 
langeoog. 
To procure basic material for a new edition of a fishery chart, survey and 
research-vessel "Gauss" undertook a survey-cruise in the waters between Iceland 
and Greenland. Surveying work centered in the area from the Gammelloch across 
the Anton-Bohrn-Bahk to the fishing ground of Angmagssalik. 
In addition to her surveying activity, survey and research-vessel "Gauss" 
carried out eight research cruises and trial trips. 
The two wreck-searching boats ascertained on the official routes in the off 
shore waters, in the river estuaries and in the surveying areas a total of 11 
new wreck positions and checked 44 wrecks determined already before as to their 
present position, state and depth. 
The survey-ship "Eungholt", which was put out of service at the end of the 
surveying period, was replaced end of December by the new survey-ship "Siideroog". 
Oceanographical work at sea had to be confined, due to the abundance of 
material still waiting to be worked up and the considerable amount of routine 
work, to some current measurements in the Horth Sea which were carried out in 
cooperation with the Federal authorities and those of Schleswig-Holstein concern 
ed with coastal engineering. The oceanographic observation material collected by 
fishery research-vessel "Anton Dohrn" could to a large extent be evaluated and 
utilized. Some members of the staff of the DHI took part in her cruises in the 
northern waters. 
The studies of numerical calculation methods for the ascertainment of the 
wind-conditioned water movement by means of an electronic computing machine and 
the kind assistance of Professor Eossby from the Swedish Meteorological Insti 
tute at Stockholm were, for the time being, brought to an end. 
In cooperation with the Deutsche; Wissenschaftliche Kommission für Meeres 
forschung, the International Council for the Exploration of the Sea and the 
Comité Spècial de l'Année Géophysique Internationale plans for a quasi-synoptic 
oceanographic survey of the Horth Atlantic Ocean were set up. 
Routine cooperation in the Sailing Direction Work as well as the taking 
care of the Ice Service and of the geomagnetic work were done as usual. An Atlas 
relating to the ice conditions in the German Bight and in the western Baltic is 
in the press. 
The Hautical Tear-Book and the Tide Tables, Toltane I of which was extended 
+) Die Umschau 1957, Heft 3.