Remote Control from Bridge:

• In modern engines, manoeuvring is carried out by an electronic remote control system.
• The telegraph lever on the bridge sends a signal corresponding to the required direction (Ahead/Astern).
• Depending on this signal, the corresponding solenoid valve is activated. Control air is then directed to the Ahead or Astern switch of the main engine.

Operation in Ahead direction:

• If Ahead is selected, control air is supplied to the starting air distributor and the fuel pump reversing pneumatic cylinder, setting the roller for Ahead direction.
• Interlocks ensure that the distributor and pneumatic cylinders are correctly set before starting.
• Once interlocks are satisfied, the electronic control system gives a start signal. This activates the pneumatic cylinder of the Main Auto Start Valve, admitting air to the starting air valves.
• The starting air valves open according to the firing order through the starting air distributor.
• When sufficient turning speed is reached, starting air is cut off and fuel is admitted, thereby starting the engine.

Stopping:

• When the telegraph lever is brought to Stop position, a solenoid activates to supply air to all fuel pump puncture valves, cutting off fuel and stopping the engine.

Reversing:

• For Astern, the telegraph lever is positioned to Astern.
• The Ahead switch is vented, and air is directed to the Astern switch through the solenoid.
• The same sequence of interlocks, air distribution, and fuel setting occurs as in Ahead operation, but in reverse direction, thereby starting the engine Astern.

• If the remote system fails, control is shifted to the local control station.
• The selector switch at both the remote and local control stations is turned to Local/Emergency. This action supplies control air to the local control system.

Fuel Control:

• The engine governor is bypassed by unlocking the input handwheel and rotating it.
• The local handwheel at the control station now directly controls the fuel index.

Starting Procedure (Local):

1. Select the engine direction (Ahead/Astern) so that the air distributor and fuel cam rollers are set, as in remote control.
2. Ensure all interlocks are satisfied.
3. Press the START push button at the local station. This supplies air to the pneumatic cylinder of the Main Auto Start Valve, admitting starting air to the engine.
4. Rotate the fuel lever handwheel to admit fuel, starting the engine on fuel.

Stopping (Local):

• Press the STOP push button, which directs air to all fuel pump puncture valves, cutting off fuel and stopping the engine.
• The fuel lever handwheel is then returned to zero.