... hydraulic rudder of ships. The advantages of the hydraulic steering control units: 1.Low cost, reliable. 2.No load reaction on ... .Manual operation available when the pump doesnt work. 4.Low control torque, continuous operation. 5.According to the system, different function ... .5<31777.2BPB1,3-5005005017.52.5<51978 Hydraulic Steering Control Units