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PHYSICAL OCEANOGRAPHY (E, Mittelstaedt, K, Huber) 
The measurement equipment used for the hydrographical 
recording were bathysonde (Type T87/3, Howaldtswerke 
Deutsche Werft, Kiel) and hydrocasts, Only on the 
northern section along 36°N the multisonde (Institut 
für Angewandte Physik, Kiel) was used instead of the 
bathysonde, 
The data (T, C, P) were stored on punched tape and 
processed later in the Deutsches Hydrographisches In- 
stitut, T and P data could be taken direct, after 
allowing for a correction., The salinity determination 
was done using a formula by Rohde (1968), The density 
x was calculated according to Lafond (1957). 
The temperatures from the series measurements and the 
comparison measurements of bathysonde and multisonde 
were corrected according to usual methods. 
The salinity of the samples was determined by means of a 
Beckman salinometer during, and following, the voyage, 
In order to be able to compare the presented measuring 
results with the corresponding data of other sections 
they must be referred to an internationally applied 
measurement method. For temperature, this is presently 
the measurement using reversing thermometers, and for 
salinity this is sampling with subsequent salinity de- 
termination in the laboratory, Therefore, the standard 
deviation is taken in this connection as the absolute 
accuracy of measurement, This standard deviation (con- 
fidence interval 66%) is obtained from the comparison 
of the bathysonde (resp. multisonde) measurements and 
simultaneous (or comparable) sampler measurements, 
Three different series of measurements were available 
for an estimation of that absolute accuracy of measure- 
ment: