Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Heincke	HE494	30.08.2017 - 04.09.2017		North Sea

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Buck Bela Hieronymus	Alfred-Wegener-Institut fur Polar- und Meeresforschung	Bremerhaven	Cuxhaven

Ziel der Reise / Objectives of Cruise:

HE494:FS Heincke cruise HE 494-1 from 30th August – 1st September 2017 scientifically led by Prof. B. H. Buck started in Bremerhaven and ended in Cuxhaven (Germany). On day 1 (30th August 2017) RV Heincke followed a transect from Bremerhaven to Helgo-land. On this transect seven stations were sampled. Water masses were characterized using the CTD device (Conductivity, Temperature, Depth, Oxygen). The water rosette was used to sample water from at least two different depths with the water column at each station. The Van-Veen corer was deployed to sample surface sediments which were analysed for benthic organisms, sediment configuration, and grain size). Nansen and Apstein net hauls were ap-plied to sample pelagic plankton. The water samples, which were taken on the first section of the cruise, were filtered and frozen for later nutrient and chlorophyll investigations back in the lab of the University of Applied Sciences in Bremerhaven. Sediment and infauna sam-ples were analysed on-board. On the second day (31st August 2017), exploratory fishing was carried out in the region of the "Tiefe Rinne" near Helgoland. For this investigation beam and bottom trawls were carried out. Every fishery action was accompanied with CTD sampling. The collected fish was taxonomically determined, counted, and measured with respect to size and weight as well as other fishery relevant parameters. Additionally, samples were taken within the offshore wind farm ?Meerwind Sud"(Operator: WindMW). A permit/approval to sail in and out as well as to take samples (data of entry/exit as well as coordinates of sample area) was ob-tained in advance and provided to the captain of RV Heincke. CTD and sediment samples were taken (similar to day one). Initially sampling using scuba was planned within the project Restore. Due to unsuitable weather conditions this sampling procedure was cancelled. On the third day (1st September 2017) the cruise track went from Helgoland to Cuxhaven which included an increasing influence of the River Elbe. On this transect, 5 stations were sampled using the same techniques as on day one. The cruise was solely educational (students of the University of Applied Sciences Bremerha-ven). The aim of the cruise was to focus within the first part on marine biology and the influ-ence of the rivers Weser and Elbe on physico-chemical parameters and on invertebrate and fish biodiversity.

Messungen / Measurements