Search route scheme for the barge Likhter-4 with solid radioactive waste and the TRO-8 disposal site, as well as sonar images of the barge and clusters of metal containers with solid radioactive waste. Light markers on the map indicate locations identified during the 70th expedition of the research vessel Akademik Ioffe and survey areas based on archival data. Credit: Shirshov Institute of Oceanology of the Russian Academy of Sciences