... ,BV,DNV,LR,GL,NK,RINA 3.Single,double rudder Manual Hydraulic Ship Steering Gear 1. Features and ApplicationManual Hydraulic Steering ... reliable operation with self-locking function and it can keep the rudder angle stable during the operation. Manual Hydraulic Steering Gear is ... . What type of your ship/vessel, river or sea, or function, types;2. Dimenssion of ship, such as length, width, height3 ...