Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Walther Herwig III	WH343	02.05.2011 - 22.05.2011	BASS	Baltic Sea

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Bottcher Uwe	Thunen-Institut fur Ostseefischerei	Bremerhaven	Bremerhaven	Karte Map

Ziel der Reise / Objectives of Cruise:

The cruise was part of the Baltic International Spring Survey (BASS). The main pelagic species of interest was sprat. Timing, surveying area and the principal methods of investigations are internationally co-ordinated by the ICES-WGBIFS. Germany covered the ICES Subdivisions 24, 25 and the western parts of Subdivisions 26 and 28. The acoustic equipment was an echosounder EK500. The frequency for the survey was 38 kHz. The hydroacoustic measurements were conducted on parallel transects with a distance of 0.5 degree longitude. The survey speed was 10 knot. To identify the fish targets, trawls hauls were conducted with the pelagic gear 'PSN 205'.The acoustic investigations and the fishing hauls were carried out in the time from 4:00 to 18:00 UTC. CTD-profiles were taken after each trawl station or at least after every 15 miles surveyed distance.

Messungen / Measurements