SIBO Telegraph ~ In the world of maritime navigation, reliable communication between the bridge and engine room is absolutely essential. One of the most critical tools to facilitate this is the SIBO Telegraph—a type of Engine Order Telegraph (EOT) used on modern ships.
At Abi Royen, we offer expert support, installation, and servicing of SIBO Telegraph systems, ensuring vessels comply with international standards and operate safely.
What is a SIBO Telegraph ?
The SIBO Telegraph is an electronic or electro-mechanical engine telegraph system developed for modern vessels to transmit engine orders from the bridge to the engine control room (ECR) or directly to the engine control console.
Unlike traditional mechanical telegraphs that rely on chains and bells, the SIBO Telegraph uses:
- Digital signals or CANBUS-based communication
- Visual and audible confirmation
- Integration with automation and monitoring systems
SIBO systems are commonly found in vessels with Unattended Machinery Space (UMS) classifications, where automation is vital for safety.
Key Components of a SIBO Telegraph System
1. Transmitter Unit (Bridge Unit)
Located on the bridge; used to send engine orders.
2. Receiver Unit (Engine Room Unit)
Receives the command and gives visual/audio confirmation.
3. Indicators (Dial or LED display)
Show the current command status clearly.
4. Signal Transmission System
Includes hardwired cables, PLC systems, or digital data lines.
5. Alarm and Feedback Units
Provide alerts in case of transmission failure or command mismatch.
Function of the SIBO Telegraph
The SIBO Telegraph acts as a bridge-to-engine communication system, enabling precise and timely transmission of engine instructions.
Key Functions:
- Transmitting engine orders such as STOP, DEAD SLOW AHEAD, HALF ASTERN, FULL AHEAD, etc.
- Alarm signaling when orders are not acknowledged
- Automatic logging of all order transactions
- Fail-safe mode in the event of power loss
- Redundant communication lines for critical safety
Some advanced versions include:
- RPM setting commands
- Mode switching (manual/auto/local control)
- Feedback from the engine room
- Integration with VDR (Voyage Data Recorder)
SIBO Telegraph System Components
- Bridge Telegraph Unit
- Touchscreen or push-button panel
- Visual indicator (LEDs or digital dial)
- Audible buzzer
- ECR Telegraph Receiver
- Acknowledge button
- Alarm interface
- Integrated with PLC or local control panel
- Control Processor Unit (CPU)
- Main processing and data handling
- Redundant setup in dual configurations
- Communication Interface
- RS-485, Modbus, or proprietary protocols
- Backup cabling for redundancy
- Power Supply and Alarm System
- Battery backup (UPS)
- Dry contacts for system health signals
International Standards and Legal Requirements
1. SOLAS Chapter II-1, Regulation 31.2
Requires:
- Two-way communication between bridge and engine room
- Redundant and reliable transmission method
- Acoustic and visual signals for confirmation
2. IMO MSC.1/Circ.1291
Defines minimum design and operational features for telegraph systems, especially in UMS-class ships.
3. Classification Society Requirements
Engine telegraph systems must be approved by:
- Lloyd’s Register
- DNV
- ABS
- Bureau Veritas
Regular inspections and calibration are mandatory during surveys and dry-docking.
Types of Engine Telegraphs (Including SIBO Telegraph)
| Type | Description | Technology |
|---|---|---|
| Mechanical Telegraph | Traditional, uses chains and bells | Manual |
| Electro-Mechanical | Push-button with signal repeaters | Relay-based |
| Electronic Telegraph (SIBO) | Digital, automated response with feedback | Microcontroller |
| Integrated Bridge Systems (IBS) | Fully digital, part of navigation system | CANBUS, Ethernet |
The SIBO Telegraph represents the third category—offering modern safety, automation, and integration.
Real-World Example: SIBO Telegraph on a Container Vessel
On a 12,000 TEU container vessel, the SIBO Telegraph system is configured as follows:
- Bridge Panel: Allows officers to select orders via rotary switch or touch buttons
- Engine Control Room: Receives and acknowledges orders with visual confirmation
- Alarm System: Activates if the command is not acknowledged within 30 seconds
- Data Logger: Stores order and acknowledgment logs for audit and VDR review
- Integration: Linked with propulsion control system and alarm monitoring
This configuration ensures that in any emergency (e.g., sudden stop or reverse), the system delivers commands accurately and without delay.
Advantages of the SIBO Telegraph System
- Compact Design: Saves space in ECR and bridge
- Fail-Safe Operation: Built-in redundancies
- Clear Audible Alarms: Prevent operator error
- Networked Monitoring: Can be integrated with SCADA or ship monitoring
- Service-Friendly: Module-based components simplify maintenance
Calibration and Maintenance Guidelines SIBO Telegraph
Why Calibration Is Essential
- Ensures the order positions match the signal output
- Avoids false alarms or missed acknowledgments
- Maintains compliance with class society and IMO audits
Calibration Tools
- Signal simulators
- Multimeters
- System diagnostic software (for smart units)
- Bridge/ECR test routines
Routine Maintenance Checklist
| Task | Frequency |
|---|---|
| Test order signal and alarm sounder | Monthly |
| Verify order position feedback | Quarterly |
| Clean terminals and tighten connections | Quarterly |
| Full calibration and function test | Annually |
| Log backup and firmware update | As required |
Abi Royen offers complete field service and workshop calibration for all major marine telegraph brands including SIBO, Data Hidrolik, Kockumation, and Autronica.
Common Issues and Troubleshooting of SIBO Telegraph
| Problem | Cause | Solution |
|---|---|---|
| Order not received in ECR | Signal cable fault | Check continuity and connectors |
| Alarm continues after acknowledgment | Feedback mismatch | Recalibrate or replace sensor |
| No power at bridge panel | Blown fuse or PSU fault | Check supply module |
| Data not logged | CPU or memory module error | Replace or update software |
Repairing a SIBO Telegraph
If a malfunction occurs, here’s a general repair procedure:
1. Initial Diagnostics:
- Check power supply voltage.
- Use a multimeter or signal tester to locate circuit breaks or faults.
2. Electronic Component Check:
- Inspect PCBs for burnt components, cold solder joints, or short circuits.
3. Signal Communication Check:
- Verify signal continuity from transmitter to receiver. Look for damaged cables or loose connectors.
4. Component Replacement:
- Replace damaged relays, ICs, or control modules as necessary.
5. Software Reset or Firmware Update:
- Some digital systems require software resets or firmware updates.
6. Post-Repair Testing:
- Conduct a full system test to ensure proper function before returning to operational use.
Spare Parts and Support by Abi Royen
We supply and install:
- SIBO telegraph bridge units
- Control processors and repeaters
- Visual and audible indicators
- RS-485 and CANBUS cabling
- Communication modules
- Battery backups and UPS
Our technicians are trained to troubleshoot and replace modules in port or offshore. We also provide remote diagnostics when connectivity permits.
Why Choose Abi Royen for SIBO Telegraph Services
With years of experience in marine instrumentation and automation, Abi Royen is a trusted name among shipowners and operators across Indonesia and Southeast Asia.
Our Services Include:
- New SIBO telegraph supply and installation
- Calibration & function testing
- Class survey preparation and documentation
- Alarm system integration
- Emergency repairs and module replacement
- VDR integration and communication logging
Conclusion of SIBO Telegraph
The SIBO Telegraph plays a vital role in safe ship operation—bridging command between the bridge and engine room in a fast, reliable, and regulated manner. Whether you’re sailing with full crew or in UMS configuration, telegraph calibration and reliability is non-negotiable.
With Abi Royen, you gain a trusted partner who delivers class-approved, reliable telegraph services—keeping your vessel safe, certified, and operational.
👉 Visit https://abiroyen.com or contact our marine automation team today for a quote, consultation, or service request.
📞 Need Help with Your SIBO Telegraph System?
Contact Abi Royen Technical Services for inspections, maintenance, or emergency repairs.
Safe navigation starts with clear, reliable communication.
