at the end of the chapter.
S-57 is a public format used for data exchange and transfer but the charts in this format
cannot be used directly in ECDIS. Therefore ECDIS converts ENC data with S-57 format to
proprietary format. The converted charts are called SENC.
There are several sources providing ENC data: Primar in Stavanger distributes ENC data for
North European countries and France, UKHO for other European countries, Japan HO for
Japanese areas, MPA for Singapore harbour etc.
MARIS chart service includes several services to help the user including:
• Delivering charts from different sources
• Information on ENC availability
• Quotation and ordering facilities for specific areas or for charts along ship’s routes
• Handling and sending updates from several sources.
ENC data from one source are delivered on 2 CDs:
• One base CD containing the charts issued at a certain data
• An update CD containing updates for the charts, new charts and new edition of charts.
ENC are in general encrypted and chart permits are required to be able to use them. The
permits are ordered directly to MARIS.
ECDIS operates ENC under a seamless mode and automatically loads new cells when scrolling
or zooming all over the world.
When the chart area cannot be covered with ENC data for the selected navigational purpose,
the remaining part of the chart area is filled with data based on a more navigational general
purpose.
ECDIS900is compliant with IEC61174 ed3 regarding ENC chart Installation and Update from:
• Single Media using Multiple Exchange data sets
• Multiple exchanges set across multiple media sets.
IMPORTANT
The chart information to be used in ECDIS should be the latest edition of information
originated by the government HOs and conform to IHO standards.
USING S57 CHARTS
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