After you download and unzip the chart, you must select the KAP file to
Geographic will probably give the best results in MICRODEM.
UTM also works.
You can also convert the KAP file by opening an image (the .KAP file)
and letting GDAL convert. If it
does not display, you must then run GDAL_warp on the Geotiff created.
Making this one stop is on our to do list.