Mylène Josset, radioactivity measurement specialist from French independent laboratory ACRO, conducting radiation survey work from Asakaze, a Japanese research vessel chartered by Greenpeace Japan, off shore of Fukushima Prefecture. Greenpeace is doing sea bed survey and sampling of marine sediment with the Rainbow Warrior acting as a campaign support ship. A gamma ray spectrometer is used to measure the distribution of radioactivity discharged from the plant, and sampling and the under water videos /stills documentation are conducted by a Remotely Operated Vehicle (ROV). All samples will be sealed up before transport to independent laboratories in Japan and France.