Figure 10-9.--Rudder angle transmitter.

steering orders to the steering gear room. The order

and indicating systems associated with this console

are the rudder angle indicator, the rudder order, and

the steering emergency alarm signal. The steering

control console also contains ship's course indicators,

a helm angle indicator, and a steering wheel (helm).

Some steering control consoles also contain a

magnesyn compass repeater.

The helm angle indicator is a synchro receiver

that is connected to a synchro transmitter attached to

the steering gear. It indicates the mechanical position

of the steering gear. The steering wheel (helm) is

used to steer the ship. The magnesyn compass

repeater is maintained by the ship's Quartermasters.

Rudder Angle Indicator

The rudder angle indicator system (circuit N)

provides a means of electrically transmitting the

angular position of the ship's rudder at the rudder

7.126.6

head to designated stations throughout the ship.

Figure 10-10.--Rudder angle indicator

(circuit N).

The rudder angle transmitter (fig. 10-9) is located

at the rudder head and consists of a synchronous

transmitter mechanically linked to the rudder stock

to the transmitted angular displacement on the dial

in such a manner that its shaft follows the movement

face.

of the rudder. It transmits the angular position of the

rudder angle to various ship's rudder angle indicators

Figure 10-11 is a block diagram of the rudder

via the action cutout (ACO) section of the steering

angle order and rudder angle indicator systems,

gear room IC switchboard.

showing the various units and their locations.

The rudder angle indicator (fig. 10-10) consists of a

A combination rudder angle order indicator (fig.

fixed dial and pointer, which is mounted on the shaft

10-12) is located in the steering gear room in front of

of a synchro receiver. The receiver rotates the pointer

the steering gear room trick wheel. The trick wheel is

used to steer the ship under emergency steering

conditions.

Single rudder angle indicators are located in the

engine rooms, bridge wings, CIC, pilothouse, and

navigation bridge.

Rudder Order

The rudder order system (circuit L) provides a

means of electrically transmitting rudder angle

orders from the steering control console in the

pilothouse to the steering gear room when the ship is

being steered from the steering gear room.

The rudder angle order indicator transmitter is

located in the steering control console. The helmsman

operates the transmitter when a change in rudder

angle is ordered by the OOD.

7.129

A push button is also provided on the console to

Figure 10-9.--Rudder angle transmitter.

ring a bell in the steering gear room so that the

10-6