RMS retractable thrusters are  a very efficient solution in all those cases in which the shape of the hull doesn’t allow the installation of a fixed classical bow thruster. RMS retractable units are fitted with electro/hydraulic system to switch the propeller form its “off” to “on” position and are available in steerable versions. The propeller in this last case can also be tilted to direct the thrust on 360° increasing the manoeuvrability of the ship at zero speed.