Part B - Technical instructions 
31 
Baseline study 
Construction Operation phase 
phase 
Method 
(continued) 
• The original radar display should be transferred with as little loss as possible to a 
computer that is equipped with suitable software for the capture and evaluation of 
radar images. 
• For platform based surveys, the recommended alternative is a fixed pencil beam 
radar (radar with fixed dish aerial). Method and evaluation should be co-ordinated 
with the BSH (see Dittmann et al. 2013, Kulemeyer et al. 2011, Neumann et al. 
2009). 
Surveillance radar: 
• Objective: Recording of flight direction and inten 
sities. 
• Survey conditions: Depending on the ship’s con 
figuration, the surveys can be usually carried out 
in stronger winds of up to 3 Bft and at wave 
heights of up to 0.5 m. Platform based surveys 
can be carried out at even higher wave heights. 
• Radar specifications: Horizontally scanning radar 
with an output of min. 25 kW (x-band radar). 
Specifications see vertical radar. 
• Standard operating range: 3 km. Exceptions are 
only allowed for targeted observations (evasive 
behaviour). 
• Comparability of results is essential in selecting 
equipment and making equipment settings. 
• In the event of platform based surveys, a recom 
mended alternative is the use of a radar device 
with rotating dish aerial. Method and evaluation 
should be co-ordinated with the BSH (see Hill et 
al. 2013, Hill et al.2012). 
Presenta 
tion of 
results 
Presentation of radar observation results: 
• The altitude distribution requires a distance correction. It takes into account the 
detectability and volume of the radar beam and is individually calculated for each 
radar device (see p. 63). 
• Results to be shown as echoes per hour and kilometre (e. g. Liechti & Schmal- 
johann, 2007).