Navigation General · ECDIS & Electronic Aids
The electronic chart data used in a type-approved ECDIS must be in which format?
- ARNC (Raster Navigational Chart) format only
- BENC (Electronic Navigational Chart) in IHO S-57/S-100 vector format✓ Correct
- CAny commercial chart format approved by the vessel's flag state
- DPDF facsimile scans of official paper charts
Explanation
Type-approved ECDIS must use official ENCs in IHO S-57 vector format (with S-100 as the next-generation standard). ENCs contain objects and attributes that the ECDIS can query for alarms. RNC (raster) charts are scanned images; while some ECS systems display them, they cannot provide the same alarm functionality and do not satisfy ECDIS carriage requirements.
Authority: Bowditch (Pub. 9), Ch. 14
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