Semi-balanced rudder with a certain part of the blade area put forward of the turning axis. Like the balanced rudder, the certain area forward of the turning axis will cause water pressure on this portion to counterbalances the water pressure of the after portion.

The upper rudder carrier is a bearing of the ship's rudder device to support the rudder stock. It was mounted on the deck between the steering gear. The upper rudder carrier can not only ensure that the rudder stock does not fall into the water..