Abstract
The Japan Marine Science & Technology Center carried out a search for the “Tsushima-maru,” a school children evacuation ship which was sunken during the World War II. In this search, we first measured the bottom surface reflection intensity over the entire sea, and narrowed down to a special point using the multi narrow beam echo sounder (SEABEAM 2112.004) equipped to the vessel bottom. Then, the vicinity of the investigated with a towing side scan sonar. Eventually, a TV camera on board an remotely operated vehicle confirming the hull of the ship. The search for the sunken ship was utilized to investigate the performance of the sonars. As a result, resolution and detection abilities of various sonar were confirmed in actual ocean operations.
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