7 
dominating signal in time series in the German Bight. 
Except for the station 76255/256 southwest of Helgo- 
land the sense of rotation of the tidal stream is anti 
clockwise. In general, lower velocities were recorded 
by the deeper current meters. The PDVs of the vector 
series and the diurnal mean values of the residual 
current (black arrows - bottom layer) reveal that the 
systems of residual currents of the surface layer and 
the bottom layer do not coincide. No correlation could 
be found between the residual current and the local 
wind. So, residual currents constantly setting north- 
east were observed off the Weser Mouth (Schlüsseltonne) 
In the valley of the River Elbe residual transports 
were found in the bottom layer which temporarily were 
directed towards the Elbe estuary. 
The sea wave spectra observed during the remote sensing 
campaign show, throughout, swell portions in the period 
range between 5 and 7 seconds. This swell has wavelenghts 
between 40 and 75 m. The local wind sea is much shorter; 
its focal point was on 28 August, with a wave length 
of 25 m and a period of 4 seconds; on 29 August it was 
25 to 15 m and 4 to 3 seconds. On 30 August local 
wind waves can be recognised besides the swell only from 
12 hrs. on, whose wavelength increases from 4.5 to 10 m 
until 15.00 hrs.