19 
three hydrographic surveys in a narrow-spaced grid. 
Figs. 2, 13, 24, 30 and 41 show, in chronological 
order, the positions of the hydrographic stations and 
of the moorings, 
The investigations had to be limited to areas with 
water depths of more than 10 metres. On account of the 
strong horizontal gradients the distances between the 
hydrographic stations were kept very small. Due to the 
strong tidal streams it was, however, useless to reduce 
the distances further. 
In spite of the relatively small area of investigations 
and of the resulting fast hydrographic surveys which 
took about 40 hours, the vertical sections may be 
regarded as strictly synoptic, whereas the overall 
surveys may not. On the stations a CTD system (Bathy- 
sonde, HDW) was deployed, and so was a thermo-salino- 
yraph between the stations. 
Data (G.A. Becker, H. Carlson) 
The data of the hydrographic surveys are represented in 
the graphs given below, in the form of horizontal dis- 
tributions, vertical sections and TS diagrams. The 
graphs are grouped according to the three cruise 
legs. 
Subsequent to the representations of the second leg 
those hydrographic observations are shown that are di- 
rectly related to the Airborne Remote Sensing Programme.