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Teil C - Annex 
4 Marine mammals 
See table 4.2: Survey of habitat use. 
Figure 11: Sketch of the anchoring system of a POD station comprised of 3 individual PODs 
(Design: C. Honnef/M. Gauger). 
Process instruction for statistical analysis of the C-POD data collected within the frame 
work of the StUK monitoring. 
Variables and selection criteria 
The following section describes the procedure for the currently prevailing measuring system 
C-POD including the software C-POD.exe used for classification. Should other, equivalent 
measuring systems be issued, comparability of the variables and detection probabilities must 
be ensured. 
For analysing the origins of the click trains (in C-POD.exe), the measuring system C-POD pro 
vides the variables NBHF (narrow band high frequency), Other cet and Sonar. The statistical 
data evaluation should use the variable NBFIF, which in the North and Baltic Seas is largely 
attributed to harbour porpoises (Phocoena phocoena). 
For the variable TrClass (train class = quality parameter determining the degree of probability 
which which classified click trains actually may be attributed to harbour porpoises), only the 
values Hi (high probability that the click train should be attributed to a harbour porpoise) and 
Mod (sufficient probability that the click train should be attributed to a harbour porpoise) 
should be selected. A “detection” has occurred, when a click train falls into one of these two 
classes. 
The chosen parameters should be DPM (detection-positive minutes) and DP10M (detection 
positive 10-minute intervals). The accuracy may be varied to describe harbour porpoise activity