By shifting the telegraph lever from FULL AHEAD to NAVIGATION, a gradual acceleration program is activated; the program is adjustable and enables the engine to reach navigation RPM's in the desired lapse of time.
If any fault occurs during gradual load take-over the engine load increase is interrupted; the engine stabilizes at the value reached at the moment in which the fault occurred and remains in that condition until the fault disappears.
Automatic resumption of power increase takes place according to the preset gradient.
If one of the stand-by causes persists beyond a given time the device automatically starts decreasing the load, beginning from stand-by position and persists until its determining cause disappears. The decrease may occur according to two adjustable speeds which are automatically selected by the programme as a function of the seriousness of the fault.
The following are some of the anomalous conditions which determine the limiting and safety functions described above:
- fresh cooling water high temperature at the outlet of each cylinder;
- cylinder exhaust gas high temperature versus average value;
- cylinder exhaust gas mean temperature;
- thrust bearing, journal bearing, stern tube bearing, crosshead bearing, and big end bearing high temperatures;
- cylinder average high temperature, piston cooling fluid low flow rate;
- engine luboil high temperature;
- fuel injectors cooling fluid flow failure.
Emergency
Shield push-buttons are provided both on Bridge and ECR. By means of these push-buttons some safety and protection facilities may be excluded (RPM reduction, torque limitation, acceleration gradient, engine power manual limitation).
If a "crash stop" is affected in this condition, the admission of starting air takes place at a number of RPM's higher than required for normal reversal and the RPM set-point, as well as positioning limit of the fuel oil lever are automatically brought to a third emergency level.
If said emergency starting RPM's are not reached within a certain limit, the air valves close and a starting failure alarm is displayed.
To repeat the "crash stop" operation, the operator must reset the engine telegraph on STOP position and then set the desired number of RPM's.
Starting control from the Engine Control Room (ECR) and navigation on a ship involves a series of procedures and checks to ensure smooth operation. Here’s an overview of the typical steps involved in the process:1. Preparatory Checks
a. Communication:
- Establish communication with the bridge and other relevant departments.
- Ensure all communication equipment is functioning.
b. Documentation:
- Review standing orders and night orders.
- Check engine room logbook for any special instructions or ongoing issues.
2. Engine Room Checks
a. Engine Status:
- Verify the status of the main engine and auxiliary engines.
- Ensure that all necessary systems (fuel, lubrication, cooling) are operational.
b. Control Systems:
- Ensure all control systems are functioning correctly.
- Check the automation and monitoring systems for alarms or faults.
c. Safety Systems:
- Confirm that all safety systems and alarms are operational.
- Ensure that fire detection and extinguishing systems are ready.
3. Starting the Main Engine
a. Pre-start Checks:
- Perform pre-start checks according to the checklist.
- Verify fuel oil, lube oil, and cooling water levels.
- Ensure air compressors and starting air receivers are ready.
b. Starting Procedure:
- Start the engine in manual mode initially to check for any abnormalities.
- Once verified, switch to automatic mode if applicable.
4. Navigation Readiness
a. Bridge Communication:
- Confirm with the bridge that the engine is ready for maneuvering.
- Coordinate with the bridge for any changes in speed or direction.
b. Steering Gear:
- Ensure the steering gear is operational and tested.
- Verify emergency steering procedures.
5. Monitoring and Adjustments
a. Continuous Monitoring:
- Monitor engine parameters continuously (temperature, pressure, RPM).
- Keep an eye on fuel consumption and efficiency.
b. Adjustments:
- Make necessary adjustments based on operational conditions.
- Ensure smooth transition from maneuvering to full sea speed.
6. Emergency Preparedness
a. Emergency Procedures:
- Review emergency shutdown procedures.
- Ensure all personnel are familiar with emergency protocols.
b. Standby Systems:
- Ensure standby systems and equipment are ready to be deployed.
- Regularly test emergency power and lighting.
7. Logging and Reporting
a. Logbook Entries:
- Record all relevant data and observations in the engine room logbook.
- Note any abnormalities and actions taken.
b. Reporting:
- Report to the Chief Engineer and bridge any significant issues or events.
Following these steps ensures the main engine is started safely from the Engine Control Room and that the ship is ready for navigation. Always adhere to the specific procedures and checklists provided by your vessel’s operating manuals and safety protocols.
