Optional use of ECDIS
• RNCs are produced according to international standards;
• RNC content is the responsibility of the issuing Hydrographic Office; and
• RNCs are regularly updated with official update information distributed digitally.
Facts about chart carriage reguirements 11
The IMO performance standards for ECDIS states that where official ENCs are not
available, RNCs may be used in ECDIS to meet carriage requirements2. However, when
the ECDIS is using RNCs it should be used together with an appropriate folio of up to
date paper charts. See section “Meeting carriage requirements for ECDIS” below and
Annex III for further details.
How are charts kept up-to-date?
In order to meet carriage requirements, official charts must be kept corrected by Notices
to Mariners issued by Hydrographic Offices.
Up-dating paper charts
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