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) 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 e (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 became 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 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.
- "Towards ECDIS Mandatory Carriage". Hydro International. Retrieved 2007-09-02.
WEINTRIT Adam: The Electronic Chart Display and Information System (ECDIS). An Operational Handbook. A Balkema Book. CRC Press, Taylor & Francis Group, Boca Raton – London - New York - Leiden, 2009. (ISBN 9780415482462), http://www.crcpress.com/product/isbn/9780415482462
- Fugawi Marine 5 navigation software
- OpenCPN - free (GPLv2) navigation software
- NAVCruiser NavSim Technology
- PolarView NS - free chart viewer for ENC charts in S-57 format
- Nuno Navigator - Marine navigation software provided by CherSoft LTD
- SeeMyENC - free ENC and IENC viewer (and download for Windows)
- dKart Look - free viewer for S-57 ENC and Inland ENC, GeoTIFF and OGC WMS data
- MapLink Pro Free ENC Viewer
- IMO Electronic Chart Overview
- Transas Electronic Navigational Charts, World Folio
- International Centre for ENCs, one of two RENCs in the world
- PRIMAR, one of two RENCs in the world
- United Kingdom Hydrographic Office
- Electronic Chart Centre (ECC)
- Product Survey ECDIS - ECS+ software
- Office of Coast Survey, has free download of ENCs for US.
- Inland Electronic Navigation Charts (US)[dead link]
- Open Electronic Navigation Charts Directory