As I recall on this data set Bell Geospace Inc. derived most of this data from GEODAS. It was never clear why it was proprietary if they used our data anyway. The data are in ~1 minute gridded intervals. All I could figure is that they included some of their data to make the data set better. You should check any emails from Dave Cole for more metadata if needed.
Some of the lat/longs where missrepresented in some of the files.
I reformated the files to reflect a more standard xyz bathymetric data file in the *_new.xyz files.
The data sets (surveys?) are BELL02 and BELL01.
-wtv 11/2006-