ECDIS
ECDIS (Electronic Chart Display and Information System) is an IMO-approved navigation system that displays official Electronic Navigational Charts (ENCs) and integrates sensor inputs such as GPS, gyro compass, speed log, radar, and echo sounder. Under SOLAS Chapter V, ECDIS can be used as the primary means of navigation, replacing paper charts when fully compliant.
Is ECDIS mandatory under SOLAS?
Yes. SOLAS Chapter V mandates ECDIS carriage for specified ship types and sizes, including passenger ships and cargo ships ≥3,000 GT, as per the IMO implementation schedule.
Can ECDIS replace paper charts?
Yes, paper charts can be replaced if:
The ECDIS is IMO-approved
Official ENCs are used
A compliant backup arrangement is provided
What charts are allowed on ECDIS?
Only official ENCs issued by or on behalf of a national hydrographic office are accepted for SOLAS compliance.
What is an ECDIS backup arrangement?
A backup may be:
A second independent ECDIS, or
A full set of up-to-date paper charts, depending on flag state requirements
What sensors must be connected to ECDIS?
Mandatory inputs include:
Position source (GPS)
Gyro compass (heading)
Speed log
Optional inputs include radar and echo sounder.
Is ECDIS training mandatory?
Yes. IMO requires:
Generic ECDIS training
Type-specific training for the installed system
How are ECDIS updates managed?
ENCs must be regularly updated, and update records must be available for inspection.
How is ECDIS checked during PSC inspections?
Inspectors verify:
ECDIS approval certification
Valid ENC permits
Backup arrangement
Officer training certificates
Alarm and safety settings
What happens if ECDIS fails?
The failure must be recorded, and navigation must continue using the approved backup system until repairs are completed.
What is the difference between ECDIS and ECS?
ECDIS: IMO-approved system using official ENCs, accepted under SOLAS.
ECS (Electronic Chart System): Non-approved system using unofficial charts; not SOLAS-compliant.
Conclusion
ECDIS is a SOLAS-mandated primary navigation system that enhances safety through accurate charting, real-time data integration, and advanced alarm functions. When operated by trained officers and maintained in accordance with IMO standards, ECDIS significantly improves situational awareness and navigational safety at sea.