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Expedition SO251-2 with RV Sonne: EAGER-JAPAN

Chief Scientist: Prof. Dr. Achim Kopf, Marum Bremen

Expedition SO251-2/ EAGER took place between the 17th of October and the 2nd of November, 2016 in the Nankai Trough / Kumano Basi area off Japan.Besides piston corer and heat flow probe, ROV PHOCA which had to "jump in" due to logistic problems regarding ROV KIEL 6000 , was one of the main tools to fulfill the tasks of this cruise. 

The main task of the ROV was the localisation and recovery of long term observatories which had been deployed 4 years ago during expedition SO222. Two so-called Mebo Plugs and two temperature loggers (see images below) were recovered without any further technical support. For the recovery of a so-called Smart Plug und a Mebo Cor, a ship wire fitted with a recovery hook was needed. Pulling with the ship's winch, both observatories were lifted on board. 

In total, 7 dives in water depths of approximately 2000 m were accomplished with a bottom time of approx. 35 hours and a total dive timem of approx. 54 hours.

Images (unless otherwise noted): ROV-Team GEOMAR; for enquiries regarding the use of image material please turn to  Pressestelle GEOMAR oder Dr. Friedrich Abegg.


  • Scientific Head

    Dr. Friedrich Abegg
    GEOMAR Helmholtz Centre for Ocean Research Kiel
    Wischhofstr. 1-3
    D-24148 Kiel
    Technology & Logistics Centre
    Tel.: 0049 431 600-2134
    Fax: 0049 431 600-2680
    E-mail: fabegg(at) 

    Technical Head

    Martin Pieper (Dipl. Ing.)
    Technology & Logistics Centre
    Tel.: 0049 431 600-1688
    Fax: 0049 431 600-2680
    E-mail: mpieper(at) 

    Scientific Advisor

    Dr. Peter Linke
    Technik- & Logistikzentrum
    Tel.: 0431 600-2115
    Fax: 0431 600-1601
    E-mail: plinke(at)