Part В - Technical instructions 
37 
Method 
(continued) 
Single PODs: 
• The devices should be anchored at mean water depths. The installation of statio 
nary single PODs during the construction phase takes place in suitable distances to 
the construction site, depending on the underwater noise emitted by the construc 
tion work. The mobile single PODs are installed at 750 m and 1,500 m distance to 
the respective construction site (according to the windfarm’s license incidential pro 
visions). 
• Continuous POD measurement activity must be ensured. Data reading intervals 
should not exceed 2 months. 
Settings: 
• Principally, the POD default settings must be maintained (exception: mobile PODs 
at 750 m and 1,500 m). 
Data evaluation: 
• Evaluation and statistical analysis of collected POD data follows the process 
instruction on p. 66. 
• Principally, all collected data must be processed using the same cpod.exe software 
version. If the software is changed, it must be ensured that all data is processed 
using the same classifier (e. g. the KERNO classifier). The respective software ver 
sion must be named and, as the case may be, included in the statistics. 
• Only harbour porpoise calls of the two highest quality classes (“high” and “mode 
rate”) should be used for evaluation purposes. 
• Habitat use (frequency and length of stay in the area) is evaluated on the basis of 
harbour porpoise-positive days, hours, 10-minute and minute periods (= days/ 
hours/10 minutes/minutes during which harbour porpoise sounds are recorded). 
• During the noise-intensive construction phase, it is recommended to evaluate also 
the parameter “waiting time”. 
• East of Darss Sill in the Baltic Sea, evaluation may be carried out using the Hell 
classifier. A randomised, visual review of data has to be conducted with regards to 
classification reliability and has to be documented (s. Gallus et al. 2012). 
Presenta 
tion of 
results 
• Individual presentation of habitat use (e.g. day-time pattern (ppm/hour)) and of 
seasonal use (pplOm/day) at each POD station and each POD single position as 
well as in geographical and seasonal comparison with the other positions. During 
the baseline study, the presentation of day-time pattern is waived. 
• Presentation of waiting time during noise-intensive construction work. 
• The aerial and ship transect survey results (see table 4.1) must be included. 
• The sonic survey results (see table 4.3) must be included. 
Literature 
Brandt et al. (2013), Brandt et al. (2011), Carstensen et al. (2006), Dahne et al. (2013), 
Diedehchs et al. (2010), Scheidat et al. (2011), Teilmann & Carstensen (2012), Toug- 
aard et al. (2009), VerfuB et al. (2007).