A rudder angle indicator consists of a rudder transmitter and a rudder receiver. The transmitter is connected to the rudderhead via a lever etc. in the helm room. It communicates the rudder direction and the turning angle to the self-synchronizing machine inside the transmitter, and drives the self-synchronizing machine inside the receiver, which is located in the wheelhouse or other necessary areas, utilizing their synchronicity, thus enabling speedy and correct directions.

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