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    Sonardyne chosen for Tabriz upgrade

    Vessel & ROV News // March 28, 2003
    The first sale of a Sonardyne LUSBL (Long and Ultra-Short BaseLine) acoustic positioning system for use in the Caspian Sea has been made following the decision to install it aboard the Tabriz Halilbeyil.

    The survey vessel is to be operated for McDermott Caspian Contractors Inc and is currently undergoing a major upgrade in Baku in preparation for the new season's work.

    Following its upgrade, the Tabriz will be one of the most versatile and best-equipped vessels in the Caspian region where it will operate in a multi-role capacity on behalf of the BP-operated Azerbaijan International Operating Company.

    In addition to survey activities, the Tabriz is expected to be in demand for other construction tasks and pipelay support, particularly if offshore activity increases following the opening of new oil export pipelines. The Sonardyne system will be used insupport of this work undertaking roles such as ROV tracking.

    Sonardyne acoustic systems are already extensively used in the region, however this is the first sale of an LUSBL system specifically for use in the Caspian Sea.

    The combination of Long BaseLine and Ultra-Short BaseLine acoustic techniques is well proven in deep water for providing precise subsea positioning with accuracy that is virtually independent of depth. This, combined with excellent signal repeatability from the seabed transponder array, generates very stable positioning.

    The LUSBL system being supplied for the Tabriz is designed and manufactured by Sonardyne International at Yateley, England. The company also has offices in Aberdeen, Houston, Singapore, Brazil and Norway.

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