Presentation Deep sea exploration survey technology by JAMSTEC and results of sunken object search

土屋, 利雄  ,  TSUCHIYA, Toshio

Japan Agency for Marine-Earth Science and Technology (JAMSTEC) is the research center established by Japanese Government in 1970 to study about the ocean and earth science and technology. Especially,technology of the field of the deep sea survey will be the top level in the world. JAMSTEC was developing many deep sea survey equipment from around 1990 and was improving survey technology. These survey systems include many sonars, deep tow system, ROV (Remotely Operated Vehicle) and AUV (Autonomous Underwater Vehicle) etc. And we have succeeded in a survey and collection of many sunken ships and objects which sank in a deep sea from 1995. This lecture would be explained about the outline of the deep sea survey technology in JAMSTEC and the following examples which succeeded in survey. (1) Survey of the Russian tanker "Nakhodka" sunk by bad weather into the Sea of Japan. At depth about 2500m in 1997. (2) Survey of the "Tsushimamaru" of the evacuated pupil ship sunk by an attack of a U.S. Navy submarine during the World War II. At depth about 900m in1997. (3) Search of a main engine of the large rocket which has fallen by a breakdown at Pacific Ocean. At depth about 3000m in 1999. (4) Survey and collection of many momentos of the "Ehimemaru" of the fisheries training ship sunk by collision with a nuclear submarine of U.S. Navy. At depth 1800m in 2001. (5) Survey of the "Seitokumaru" which is a sunk fishing boat by collision with Aegis destroyer of Japan Self-Defense Forces. At depth about 1800m in 2008 During these searches, the comprehensive use of a multi-beam echo-sounder, a side-scan sonar and a narrow-beam sub-bottom profiler, deep tow system and ROV.
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