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Electronic navigational chart
An
electronic navigational chart
is an official database created by a national
hydrographic office
for use with an
Electronic Chart Display and Information System (ECDIS)
. An electronic chart must conform to standards stated in the
International Hydrographic Organization
(IHO) Publication S-57 before it can be certified as an ENC. Only ENCs can be used within ECDIS to meet the
International Maritime Organisation
(IMO) performance standard for ECDIS.
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