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These inland electronic navigation charts (IENCs) were developed from available data used in maintenance of navigation channels. Users of these IENCs should be aware that some features and attribute information could have significant inaccuracies due to changing waterway conditions, inaccurate source data, or approximations introduced during chart compilation. Caution is urged in use of these IENCs or derived products for navigation planning or operation, or any decisions pertaining to or affecting safety of vessel operation. These initial IENCs are not to be used as replacements for official government chart books, as required in the U.S. Code of Federal Regulations.

These data products are subject to change. Users should periodically check this website, or contact the U.S. Army Geospatial Center, for revised IENCs or updates. Any questions or comments relating to these IENCs or charts on the Mississippi and Ohio Rivers and their tributaries should be forwarded to the E-Charting POC.

(Charts in IENC 2.2 Product Specification)
"All charts are available"


Click Here to Download Buoy Data

Additional Download Formats
RSS Feeds
IENC 2.2 Formats IENC 2.2 Formats

*These RSS feeds (Rich Site Summary/Really Simple Syndication) allow end users to receive RSS updates and links to Inland Electronic Navigational Charts in S-57, ESRI shape file, and KML file formats.

* HOW TO SUBSCRIBE: Users can subscribe within their internet browser, or through their MS Outlook Account Settings dialog box. To add this RSS feed within MS Outlook 2007, go to the TOOLS menu, click ACCOUNT SETTINGS, click NEW on the RSS FEEDS tab, type or paste the URL of the RSS feed in the NEW RSS FEED dialog box, click ADD, click OK. To add this RSS feed within MS Internet Explorer 7, simply click on the RSS feed icon, then click on the specific RSS feed that you want to subscribe to.