Retractable thruster BTR 250-240 Kgf duo 24V 10 kW Composite, aluminium or steel counterflange, attached to the hull and independent of the structure supporting the system. The motor is integral with the structure inside the keel, and a single moving body passes through the in-out barrier, as does protection against mechanical overloads caused by accidental impacts when the system is open, making the Quick thruster particularly safe. The presence of a composite, aluminium or steel counter-flange, separate from the system's load-bearing structure, makes installation of the entire system easy, safe and compliant with current regulations on joint requirements. *Only 1 moving part linked to the structure moves from the inside to the outside; *Another guarantee of reliability lies in the high-quality materials used for the designed and commercial parts; *High galvanic protection using sacrificial anodes; *Reduced dimensions and integrated electronics complete the list of advantages of the BTR Quick propeller.