Updating enc charts

Worldwide coverage is available using the Open CPN 4.0.0 and above.

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An ENC is a vector chart that contains all the information necessary for safe navigation.

These electronic charts are produced according to the International Hydrographic Organization (IHO) standards for the exchange of digital chart information (S57).

Through ENC Improver, a web-based feedback system, users of Norwegian ENCs can easily provide feedback on faults and deficiencies in the charts.

All users who subscribe to Norwegian ENCs (who have an ENC license) will receive user access to ENC Improver through their supplier.

This may be because the manufacturer does not consider the information as relevant for the recreational user, or because it is technically impossible to include.

There is therefore a difference between an official electronic chart (ENC) and electronic charts that are used in chartplotters.

ENC Improver is a web-based feedback system for Norwegian ENCs Read more about ENC Improver.

Manufacturers of electronic charts for chart plotters purchase their data from the Mapping Authority, either official ENCs or digital versions of paper charts.

Although suppliers of unofficial electronic charts can update the maps in line with the official charts, they are not bound to frequent updates.

The regularity with which charts for chartplotters are updated will vary between suppliers.

All vessels above a stipulated size are required to navigate using official nautical charts, either in the form of approved and updated paper charts, or an approved ECDIS (Electronic Chart Display System).

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