The present invention relates to an offshore structure comprising an upending device for upending an elongate support structure from a substantially horizontal loading position on a deck of the offshore structure to a substantially vertical launch position outboard of the offshore structure. The upending device comprising a pivot axis situated near a side of the offshore structure for pivoting the upending device between the loading position and the launch position, a first end of the upending device having a connector member for pivotally connecting to the elongate support structure, the connector member in the launch position is in a position outboard from the side of the offshore structure, and a second end of the upending device is attached to a pulling device that is located on the deck of the offshore structure. The upending device is within reach of one or more hoisting means for lifting the elongate support structure.
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