I'm trying to extract the layer DEPARE from an S-57 datafile and convert it into a shapefile. I'm using ogr2ogr from OpenGeo Suite 4.5 on Windows 7 64 bit.

The problem is that when I issue `ogr2ogr -f "ESRI shapefile" depare.shp US6RI26M.000 DEPARE` I get an error `FAILURE: Couldn't fetch requested layer 'DEPARE'!`.

This seems odd because when I load the same s-57 file into QGis I can choose the layer DEPARE among all other layers. I've tried calling `ogrinfo -ro -summary US6RI26M.000` which returns the follwing:

    INFO: Open of `US6RI26M.000'
          using driver `S57' successful.
    1: DSID (None)
    2: Point (Point)
    3: Line (Line String)
    4: Area (Polygon)
    5: Meta (None)

I struggle to understand why I don't see the same layers that I get when opening the file in QGis - DISD, BRIDGE, BUISGL, BUAARE, CTNARE, DEPARE... Is the DEPARE layer part of a higher-level layer `4: Area (Polygon)` as shown by ogrinfo?

**Question: How can I extract the DEPARE layer from an S-57 file and convert it into a shapefile using the ogr2ogr tool?**

I'm clearly missing something. I've searched for related q&a but none I've found so far solves my problem.