File Extension 004

.004 File

File extension: 004
File type: Electronic Navigation Chart


Notes about the 004 file extension:



To open this file type, a required software must be installed. Without it you only see a Windows message "The following file cannot be opened" (Windows 7) or "How do you want to open this file?" (Windows 10) if you double-click the file. There click on "More apps" and choose a suitable software to view such files on your PC or from email attachments.

The 004 file type is primarily associated with 'International S-57 Hydrographic Data' by US NOAA / US Army Corps of Engineers. A vector-based digital file containing marine features suitable for marine navigation. The file is based on the International Hydrographic Organization (IHO) S-57 standard. The file extension, ".000," for a base NOAA ENC cell is used for updating. The first update for a cell will be ".001" the next ".002" and so forth. The file extension .031 is used for catalog data (metadata) relating to the chart data.

Detailed information for file extension 004:


Primary association: International S-57 Hydrographic Data
Company: US NOAA / US Army Corps of Engineers
File classification: Graphic
Related links: CARIS Easy-ENC Viewer, NavPak Demo, Fugawi View ENC

Other applications associated with file type 004:

  • Unknown Apple II File ((found on Golden Orchard Apple II CD Rom))



To change file associations press Windows Key + X and then Apps and Features > Default apps > Choose default apps by file type. Invalid file associations could be the result of underlying issues within your Windows PC.

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