A floating element (1) for forming a modularly constructed buoyancy system (2), the floating element (1) being provided with a cavity (3), and at least the first side face (12) of the floating element (1) being provided with at least one first cut-out (4) which, at its first end (41), is connected to a first channel (44) whose mouth is in a first coupling face (16), and which, at its second end (43), is connected to a second channel (45) whose mouth is in a second coupling face (18). A buoyancy system (2) which is made up of a plurality of floating elements (1) and the use of such a buoyancy system (2) are described as well. A method of forming such a buoyancy system (2) is described as well.
