The NDBC on-line data archive uses the GNU gzip utility for data compression. You will need to have access to this utility to decompress the data; if you do not have the gzip tools, you may access them on this site. NDBC provides access to these tools simply as a convenience to the public; NDBC cannot and does not accept responsibility for the content, use, or any results from the use of these tools. Also note that the latest releases, bug fixes, etc. of the gzip utilities may be found at ftp://prep.ai.mit.edu/pub/gnu.