A movable floating moorage including a set of n parallel floating booms, each comprising a main pontoon and secondary pontoons extending in a transverse direction. Some of the secondary pontoons are in register with one another in two adjacent booms and are adapted to bear on one another in the transverse direction. The moorage includes two series of n+1 lines actuated by winches and including, for each boom, two lines extending from this boom in two opposite ways in the transverse direction and connected respectively, either to an adjacent floating boom, or to a fixed anchorage. The booms are connected together and to any fixed support solely by these two series of lines.