The following is an explanation of the directory contents for the most recent release (Version D) of the NATL93 database. NATL93D.DBF - Version D of the NATL93 database. NATL93.DES - Text file containing a chronological description of all updates/changes to the NATL93 database. This file also contains the file structure for the current version of the NATL93 database. NATL93.UNI - Text file which lists each field (in the order they appear in the NATL93 database) and the units associated with that field. NATL93.QC - Text file which lists the WOCE WHP QC (quality control) flags and describes the investigator specific qc flags for the pCO2 and nutrient data. NATL93D.CSV - Comma-delimited ascii data file containing all the fields in the NATL93 database. PLEASE NOTE: If you use FETCH to transfer a *.dbf file to your MAC from a FTP location, you must first specify that it is a binary file, then FETCH will prompt you for file TYPE and CREATOR. The file type is XLS4 and the file creator is XCEL (XLS4 and XCEL must be in caps).