Fig. 2From: Drift of an ocean bottom electromagnetometer from the Bonin to Ryukyu Islands: estimation of the path and travel time by numerical tracking experimentsPhotographs of OBEM JM4 a just before deployment during cruise KS18-07 and b when it was found on Iriomote Island by the Iriomote Eco-Tourism Association. c A simplified illustration of an OBEM settled on the seafloor under normal conditions. It consists of the functional part and a weight. The photograph shows the weight release unit. d The OBEM floating in seawater after the weight has been released. The weight remains on the seafloorBack to article page