Electronic navigational chart

Electronic navigational chart

An electronic navigational chart (ENC) 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) Special 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.

ENCs are available through Regional Electronic Navigational Chart Coordinating Centre (RENCs) and national electronic chart centers. Distributors like the United Kingdom Hydrographic Office then distribute these to chart agents. In July 2008, the first mandatory requirements for the use of ENC and ECDIS will become international law.

IHO Special Publication S-63 developed by the IHO Data Protection Security Working Group is used to commercially encrypt and digitally sign ENC data. Chart data is captured based on standards stated in IHO Special Publication S-57, and is displayed according to a display format stated in IHO Special Publication S-52 to ensure consistency of data rendering between different systems.

IMO has proposed compulsory carriage of ECDIS and ENCs on high speed crafts from 1 July 2008 onwards for all new crafts, and from 1 July 2010 onwards for existing crafts. [cite web | title=Towards ECDIS Mandatory Carriage | work=Hydro International | url=http://www.hydro-international.com/issues/articles/id519-Towards_ECDIS_Mandatory_Carriage.html | accessdate=2007-09-02]

References

External links

* [http://www.imo.org/Safety/mainframe.asp?topic_id=350 IMO Electronic Chart Overview]
* [http://www.ic-enc.org International Centre for ENCs, one of two RENCs in the world]
* [http://www.primar.org/ PRIMAR, one of two RENCs in the world]
* [http://www.ukho.gov.uk United Kingdom Hydrographic Office]
* [http://www.ecc.as/ Electronic Chart Centre (ECC)]
* [http://www.hydro-international.com/productsurvey/id9-ECDIS__ECS.html Product Survey ECDIS - ECS+ software]


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