Search Operation for the Full Ocean Depth ROV Kaiko

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Search Operation for the Full Ocean DepthROV
Kaiko
INMARTECH 2004
Tetsuji Maki, Shozo Tashiro, Masayuki Watanabe,
Yoshiji Imai and Hiroyasu Momma JAMSTEC
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Self-Introduction
SHINKAI6500
In SHINKAI6500

• Pilot of manned submersible Shinkai6500

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Self-Introduction

• Research Support Department RSD
• Marine Technology Center MARITEC
• Japan Agency for Marine-Earth
• Science and Technology JAMSTEC
• JAMSTEC MARITEC RSD

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JAMSTEC RESEACH FLEET
NATSUSHIMA
KAIYO
YOKOSUKA
(1981, 1738t)
(1985, 3176t)
(1990, 4439t)
KAIREI
MIRAI
(1997, 8687t)
(1997, 4628t)
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JAMSTEC RESEACH FLEET
TANSEI MARU (1982)
HAKUHO MARU (1989)
100.0m 16.2m 8.9m 3,987t
Length Breadth Depth
Gross Tonnage
50.0m 9.2m 4.2m 604t
Length Breadth Depth
Gross Tonnage
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Manned and Unmanned Vehicles
SHINKAI 6500
URASHIMA
DEEP TOW
KAIKO
HYPER DOLPHIN
Missing!
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Topics

• ROV KAIKO
• ROV KAIKO Accident
• Active search
• Conclusion

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ROV KAIKO
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ROV KAIKO
seafloor at full ocean depth 10000m
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ROV KAIKO SYSTEMS
Primary cable
Launcher
Secondary cable
Vehicle
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ROV KAIKO SYSTEMS
R/V Kairei Primary Cable Handling System
Storage winch
Traction winch
Passive heave compensator
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ROV KAIKO SYSTEMS
Launcher
Vehicle
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ROV KAIKO SYSTEMS
Length12000m f44mm
Length250m f30mm
Primary cable
Secondary cable
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ROV KAIKO Acoustic Navigation
SSBLSuper Short Base Line
LBLLong Base Line
The vehicle is measured its position by only the
Launcher that mounted a hydrophone for SSBL.
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ROV KAIKO EMERGENCY SYSTEMS
Release actuator
Emergency weight 63kg
Sample Basket 15kg
An hour after the black out, The vehicle release
an emergency weight , a sample basket, and stick
up the radio beacon.
Radio Beacon
wires
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Operation on the day accident
Drilling Vessel JOIDES-RESOLUTION set up
A-CORK at the bore hole site 808-I in June
2001 . Restoring the pressure data fromA-CORK
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Where and how accident occurred?
Cape Muroto
29 May 2003
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Kaiko secondary cable snapped point
Launcher
Vehicle
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Kaiko secondary cable snapped point
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Kaiko Vehicle surfaced
radio beacon
1648 Two operators detected signals 3 time
continuously from the Kaiko vehicle emergency
radio beacon following it retrieved the launcher.
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A search on the accident day
R/V KAIREI began searching for the vehicle.
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Next Day
Next day,the search add two airplanes be
chartered JAMSTEC
30 May 2003
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Search By Airplanes
On 30 May,there was search whiteout weather
conditions. Because
30 May 2003
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Typhoon No.04 and No.5 tracks

• Two typhoon passed very close accident area.

31 May
5 June
Accident point
30 May
4 June
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Search By Airplanes
Life of battery capacity for the vehicle radio
beacon was 10 days.
We tried to detect the radio beacon signal of
vehicle.
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JAMSTEC chartered airplanes
Search By Airplanes
CARAVAN
MARIN
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Search By ships
R/V KAIYO
R/V NATSUSHIMA
R/V YOKOSUKA
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Search By Airplanes of JCG
JCG cooperated in the search And flew many
airplanes above area where JCG simulate
drifting vehicle.
YS-11A
SAAB340
Beechcraft 200T
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Search By Airplanes and ships
R/V SHUNYO-MARU (1,800G/T)
Do228-200
National Airspace Laboratory (NAL) And National
Research Institute of Far Seas Fisheries
(NRIFSF) cooperated in the search.
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Search area(5/29?6/21)
Search Area
Kuroshio current and Cold eddy expanded search
area
Cole eddy
Kuroshio Current
Accident point
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Payloads of Kaiko on accident day
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Payloads of Kaiko on accident day
Hanged the sample basket by
electrical wire ?
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Payloads of Kaiko on accident day
Hanged the sample basket by
electrical wire ?
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Temperature distribution
The seawater density lightened as temperature
rise.
Accident area
2 June 2003
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Density Buoyancy relation
The seawater density lightened as temperature
rise.
If the vehicle hanged the sample basket, density
that the vehicle needed to surface, was more over
1.0237.
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Density profile
Temperature distribution
North
South
Depth 0m
Depth 100m
Depth 200m
Accident area
1.025
1.024
2 June 2003
1.023
Depth 300m
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Density profile
Temperature distribution
North
South
Kuroshio is warm current. And density is more
less 1.0237. The vehicle sunk under surface here
Accident area
2 June 2003
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Conclusion

• Main facts of this failure
• (1) If we could position the vehicle under water,
  we very easy found it.
• But the vehicle was not equipped any emergency
  information equipment like a transponder without
  the radio beacon.
• (2) The Vehicle hanged the sample basket by
  electrical wire and could not have enough
  buoyancy to surface.

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Conclusion

• Main facts of this failure
• (3) Typhoon was came in most important day for
  the search.
• And the seawater density became watered down
  by rain of the typhoon.
• (4) Accident area was located near Kuroshio which
  have rapid and strong current.
• And The seawater density lightened as
  temperature rise in the Kuroshio that was warm
  current.

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END