Abstract: A system for mooring a ship or like floating vessel, in particular, an oil-tanker, to an off-shore column, and for transferring a fluid cargo such as gas, petroleum oil or the like, by means of at least one articulated arm carried by the vessel, wherein the improvement consists in that the arm supports at its upper end a connector device capable of being fixedly placed on a mouth-piece, provided on the head of the column, and that mooring apparatus is provided to allow the vessel, once the connector device is thus placed, to be moored through the device and to move around the latter so as to be placed in the wind's eye.