AN ARCTIC UNDER-ICE CABLE LAYING MISSION

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Authors
  1. Thorleifson, J.M.
  2. Davies, T.C.
  3. Black, M.R.
Corporate Authors
Defence Research Establishment Atlantic, Dartmouth NS (CAN)
Abstract
A joint US/Canadian bottom-mounted experimental array was deployed in April 1996 under the Arctic pack ice at the edge of the continental shelf north of ellesmere Island. The array signals are sent to a shore station via fiber optic trunk cable deployed by an Autonomous Underwater Vehicle. The vehicle, named Theseus, developed jointly by International Submarine Engineering Research and the Esquimalt Defence Research Detachment of the Defence Research Establishment Atlantic, can lay fiber-optic cable in a completely autonomous mode for a distance of 200 km and then return. It has a navigational error of less than 0.5% of the distance travelled; moreover, the cross-track error is reducible to 0.05%. It can operate in either a depth-keeping mode or a bottom-following mode, and it has operated at a depth of 425 m. (The design depth, as yet untested, is 1000 m). The vehicle is equipped with an inertial navigation unit and Doppler sonar for navigation, a forward-looking obstacle avoidance sonar, an acoustic homing system, tracking transponders, acoustic and fiber-optic telemetry systems for non- or semi-autonomous operation, and a sophisticated sensor integration and control computer. Although the vehicle is currently configured solely for cable laying, other missions could be accommodated with minor changes to the payload section of the vehicle. TRUNCATED
Keywords
AUV (Autonomous Underwater Vehicle)
Date of publication
01 Jan 1997
Number of Pages
26
DSTKIM No
97-02249
CANDIS No
502477
Format(s):
Hardcopy;Document Image stored on Optical Disk

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