#8 Steering Gear

Question 1

Indications and Alarms

Answer 1

warn the helsman in case of failure in any of the steering gear system

Question 2

Remote Start & Stop, stand by

Answer 2

Provided at the Navigation Bridge for control of #1 and #2 power units

Question 3

Steering wheel unit with helm indicator

Answer 3

Steering Wheel: Control movement and direction of rudder from bridge
Helm Indicator: Display the position of steering wheel

Question 4

Rudder Angle Indicator

Answer 4

Displays the Rudder Angle Indicator at the bridge

Question 5

Main Switchboard

Answer 5

Provides power to 1 of the power unit

Question 6

Emergency Switchboard

Answer 6

Provides Power to the other power unit.
Connected to emergency generator, power unit still can be used in case of power failure

Question 7

Control Unit

Answer 7

Receives alternating course signal
activate the power units, hydraulic cylnders and rams to move the rudder

Question 8

Power Unit

Answer 8

Receives Signal from control unit
activate the hydraulic cylinder and rams to move the rudder

Question 9

Emergency Control Station

Answer 9

control the steering gear
used if control from Navigation Bridge fails
located in the steering gear compartment

Question 10

Rudder

Answer 10

Control the movement of the ship

Question 11

Hydraulic Cylinders & Rams

Answer 11

power unit controls the hydraulic cylinders which will move the ram
rams connected to the rudder stock

Question 12

Follow-up (FU) Mode

Answer 12

steering gear follows the helm indicator (steering wheel)
turning the rudder until the rudder angle indicator and the helm indicator are at the same angle

Question 13

Non- Follow-Up (NFU) mode

Answer 13

Steering gear will continue to move in the direction ordered by the navigation bridge until the NFU actuating switch on the bridge is returned to the neutral position

removes the rudder angle feedback signal sent to control unit and provides the helmsman more direct control for changing the rudder angle

used in an emergency if follow up mode not working

Question 14

Feedback Signal

Answer 14

Detects the position of the rudder stock
Rudder angle feedback signal is sent to control unit
separate signal to rudder angle indicator on the navigation bridge

Question 15

Steering Ship Process

Answer 15

1. Master gives a verbal directive or an order, “10 degree port”
2. Helmsman turns Steering wheel till the helm indicator displays 10 degree port
3. Steering wheel unit sends up a follow up signal of 10 degree port from the navigation bridge to the control unit
4. No1 power unit, Hydraulic cylinders & rams activated, turning the rudder towards port direction
5. Control unit stops the rudder by sending a stop signal to No 1 power unit when rudder angle feedback signal is 10 degree port

Question 16

Power & Torque requirement

Answer 16

Rudder can be swung from 35 degrees one side to 35 degree the other side with the ship at maximum speed
time taken for 35 degree one side to 30 degree other side must not exceed 28 secound

Question 17

Power Unit operation

Answer 17

Normal Operation: 1 power unit will be running and other power unit on standby
Manoeuvring: both power units put in use