NDLI: Missing of the ROV Kaiko vehicle - problem on the secondary cable

Content Provider	IEEE Xplore Digital Library
Author	Hashimoto, K. Watanabe, M. Tashiro, S. Momma, H.
Copyright Year	2004
Description	Author affiliation: Marine Technol. Center Res. Support Dept., Japan Agency for Marine-Earth Sci. & Technol., Yokosuka, Japan (Hashimoto, K.; Watanabe, M.; Tashiro, S.; Momma, H.)
Abstract	Kaiko has been the only full ocean depth survey system in the world since 1995. The Kaiko system comprises a launcher, the vehicle, primary cable, secondary cable, on board equipment and the R/V Kairei as a mother ship. In May 2003, the secondary cable of the Kaiko snapped during the 296th dive at a depth of 4675 m in the Nankai Trough, 130 km southeast off Cape Muroto on Shikoku Island, and the vehicle has been missing. The secondary cable of the Kaiko is an electro-optical cable, and its tension member is made of aramid fiber. It was found that the secondary cable snapped against a tension less than 400 kgf, which was far below the designed breaking strength of 3 tonf. The aramid tension members were investigated and found to have weakened by bending under extremely high hydrostatic pressure, and local fatigue of the tension members occurred at the cable termination near the vehicle.
Starting Page	807
Ending Page	811
File Size	567916
Page Count	5
File Format	PDF
ISBN	0780386698
DOI	10.1109/OCEANS.2004.1405555
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2004-11-09
Publisher Place	Japan
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Remotely operated vehicles Optical fiber cables Cable shielding Conductors Accidents Marine vehicles Marine technology Grounding Oceans Optical fiber devices
Content Type	Text
Resource Type	Article

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4	Project PI / Joint PI	Principal Investigator and Joint Principal Investigators of the project	Dr. B. Sutradhar bsutra@ndl.gov.in Prof. Saswat Chakrabarti will be added soon
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