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Jahresbericht  Ur.  21/1966

the  Ice  Service  gave  517  pieces  of  information  about  the  ice  situation;
the  Documentation  of  Hydrographic  Publications  accumulated  5,000  titles
of  the  respective  literature;  the  radioactivity  of  sea  water  and  sea
floor  was  controlled;  the  Geomagnetic  Observatory  promulgated  the  geomagnetic ­
  indices;  the  G.H.I.  in  Hamburg  and  its  agencies  outside  of  Hamburg ­
  tested  about  52,000  instruments  and  devices  of  the  ship's  equipment
on  land  and  about  2,600  such  instruments  on  board.