Device (100) for achieving a temporary connection between two objects (101,102) which are movable relative to each other, comprising •respective connecting means (114,154), being brought together in order to jointly establish said connection, •a movable robot (110), arranged to continuously displace the first connecting means relative to the first object, •a control means (120), arranged to control the movements of the robot relative to the first object, as well as •a sensor means (130), arranged to continuously read a relative position between the first connecting means and the second connecting means while the said objects move relative to each other. The invention is characterized in that the control means is arranged to, while the objects move relative to each other, continuously control the robot so that the first connecting means is displaced, relative to the first object and up to the second connecting means, and there connects to the second connecting means. The invention also relates to a method.