Sea Technology

MAY 2013

The industry's recognized authority for design, engineering and application of equipment and services in the global ocean community

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Page 40 of 87

AUVs Survey The Canadian Arctic ISE's Arctic AUVs Evolve to Conduct Under-Ice Missions By Dr. James McFarlane • Raymond F. Murphy A s a Canadian manufacturer involved in the development of subsea technology, the ice-covered Canadian Arctic became a natural priority for Port Coquitlam, Canada-based International Submarine Engineering Ltd. (ISE) and its AUV program. ISE has carried out numerous Arctic operations since the program began. ARCS ISE's frst AUV was built in 1983 and was named ARCS. It was originally intended to be used for a survey of the approaches to Bridport Inlet in Viscount Melville Sound as part of a Canadian government plan to establish an LNG port in the area. When this project was abandoned, ARCS was used as a test bed for technology that would be used in future under-ice missions. Between 1985 and 1991, extensive testing of various batteries, control systems, acoustic modems, obstacleavoidance strategies and payload modules was undertaken to support the design of future AUVs. Later, ARCS was also used to develop the fber-optic cable laying strategy that would be used on a larger AUV. Theseus ISE's frst large-diameter AUV, Theseus, was the frst AUV to lay fber-optic cable on the seabed. This was the frst instance of cable laying with an AUV anywhere—in open water or under ice. The AUV was named after the mythical founder-king of Athens, son of Aegeus and Poseidon (god of the sea). Theseus laid thread in the labyrinth built by Daedalus, enabling him to escape with Ariadne, the daughter of Minos, king of Crete, after slaying the Minotaur. The Theseus program began at ISE in 1985 as part of a Canada-U.S. program to lay cable under Arctic ice. ISE and the Defence Research Establishment Pacifc (DREP) of Canada's Department of National Defence worked together to develop a large AUV for laying cable from a site near the shore of Ellesmere Island in the Canadian Arctic to a scientifc acoustic array in the Arctic Ocean about 200 kilometers from shore. Two under-ice cable-laying missions were con- Explorer AUVs on ISE's RV Researcher in Nanoose Bay during sea trials, just prior to the 2010 missions in the Arctic. (Photo Credit: ISE Ltd.) May 2013 / st 41

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