The successful ice coring expedition, ACEX 2004, proved that it was possible to stay in position for drilling (coring) for a long period during severe ice conditions with a high concentration of multiyear ice and ice drift of up to 1 knot. However, the positioning was possible only with efficient ice management. In this case the drilling vessel, a converted combined icebreaker and anchor handling tug supply (AHTS) ship, Vidar Viking, was supported by two polar icebreakers, Oden and the Russian atomic icebreaker Sovetskiy Soyuz. The ice management was organized from the Oden and the whole operation was commanded by a fleet manager.
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