Plattform Platform	Reise-Nr. Cruise-No.	Zeitraum Period	Projekt Project	Arbeitsgebiet Working area
Heincke	HE525	04.03.2019 - 10.03.2019		North Sea

Fahrtleiter Chief Scientist	Institut Institute	Auslaufhafen Port of departure	Einlaufhafen Port of return	Stationskarte Station map	Schiffsroute Trackchart
Keil Hanno	Fachbereich Geowissenschaften der Universitat Bremen	Bremerhaven	Bremerhaven

Ziel der Reise / Objectives of Cruise:

Cruise HE525 was carried out to test a new seismic acquisition approach, developed within the BMWi-Project ?BoulderDetect', in the Pleistocene sedimentation environment of the North Sea. This design consists of a rigid 8x2.5 m frame structure with a shallow water streamer system attached at the lower side. The frame is towed at the sea surface and is part of a novel method to apply acoustic beamforming algorithms to conventional seismic data. Specialized diffraction imaging approaches are used to detect glacial boulders in the subsurface. The cruise was generally affected by difficult weather conditions, however, due to the early time in year this was not unexpected. These conditions restricted the total survey time to 1.7 days of a total of 3.25 days at sea. The target area for the device tests was located north of island Helgoland. Due to personal communication with the Federal Bureau of Hydrography (BSH) and the Alfred-Wegener Institut (AWI) the presence of glacial boulders on the seafloor was known for this site. Within the 1.7 survey days this area was mapped densely with the towed frame, Micro-GI Airgun and Sparker as acoustic sources and multibeam sonar and parametric subbottom profiler. To test a second diffraction analysis approach also several 2D-seismic lines were acquired.

Messungen / Measurements

Verankerungen / Moorings