Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Poseidon	POS530	01.10.2018 - 22.10.2018	UDEMM

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Greinert Jens	Helmholtz Centre for Ocean Research Kiel (GEOMAR)	Kiel	Kiel

Ziel der Reise / Objectives of Cruise:

Poseidon cruise POS530 took place within the framework of the BMBF – funded UDEMM project (Environmental monitoring for the delaboration of munition in the sea). There are two overarching goals in this cruise: One is to test and verify the best practices developed in the UDEMM project during a large scale Baltic sampling and mapping cruise (-> blueprint for coming monitoring cruises). The second is to acquire the first scientifically acquired baseline data set of the contamination by munition contaminants (incl. TNT) in the vicinity of some of the munition dump sites in the Baltic Sea. Three main sites were chosen based on historic reconstruction work prior to the survey. The transits to and in between those sites were planned along former constraint routes during WWII. These routes were main target of the British Air Force and mines and bombs can be expected along these ways. During transits water samples were taken with CTD-rosette-mounted Niskin bottles in regular distances in order to get a dense cluster of TNT measurements across the German Baltic Sea. First action inside the research areas always was the high-resolution hydroacoustic mapping. Based on the findings, stations for the following program were planned. This included additional water sampling, the deployment of mussel bags for biomonitoring, AUV surveys with the GIRONA 500, Subbottom Profiler and ADCP profiles, underwater video surveys and sediment sampling. By the use of these methods the areas are surveyed and analyzed in terms of their munition content and distribution (as objects on the seafloor, but also dissolved inside the water), their sedimentary composition (subseafloor and surficial sediments) and their current regime. Transit Kiel-Gelting Bight (01.-02.10.2018): CTD, SVP,MBES (calibration) Gelting Bight Area 01 (02.- 04.10.2018): SVP, MBES, CTD, TV-CTD, Grab, ADCP Gelting Bight Area 02 (03.-04.10.2018): SVP, MBES, CTD, TV-CTD, Grab, AUV, Diver (Mussel bags), SBP, ADCP Transit Gelting Bight-Fehmarn (04.-05.10.2018): CTD, GoFlo Fehmarn Area 01 (05.-05.10.2018): MBES Fehmarn Area 02 (05.-10.10.2018): SVP, MBES, CTD, TV-CTD, Grab, AUV, Diver (Mussel bags), SBP, ADCP Transit Fehmarn–Lubeck Bight (10.-11.10.2018): SVP, MBES, CTD, Lubeck Bight Area 01 (11.-17.10.2018): SVP, MBES, CTD, TV-CTD, Grab, AUV, SBP, ADCP Lubeck Bight Area 02 (13.-17.10.2018): SVP, MBES, CTD, GoFlo, TV-CTD, Grab, AUV, Diver (Mussel bags), SBP, ADCP Transit Lubeck Bight-Rugen (17.-18.10.2018): CTD, GoFlo Rugen (18.-20.10.2018): SVP, MBES, CTD, GoFlo, TV-CTD, SBP, Grab Transit Rugen - Kiel (20.-21.10.2018): CTD, GoFlo

Messungen / Measurements