A stake structure which is intended to maritime use and which comprises a sleeve (2) secured in the sea bottom (1) and a tube (6) which is rigidly but removably connected with the sleeve (2) and which extends from a point below the water surface (10) and to a point above the water surface may be so produced that the tube in waters wherein ice formations may be formed rapidly may be demounted, when ice formation initiates. Moreover, the structure may rapidly be remounted, when the ice has disappeared because the tube (6) has a density which is greater than the density of water and because the tube (6) and the sleeve (2) are mutually connected by means of a wire (5) which allows separation of the rigid connection between the tube (6) and the sleeve (2). Thereby the tube (6) may be separated from the sleeve (2), when ice formation starts and the tube (6) may thereafter sink down into the water and remain upon the sea bottom during the winter.
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