The National Snow and Ice Data Center (NSIDC) (described in the October 2, 1998 Scout Report
) provides the Submarine Upward Looking Sonar Ice Draft Profile Data and Statistics. This dataset contains submarine data collected in April 1992 from Navy cruise L2-92, September 1993 from SCICEX-93, and September and October 1996 from SCICEX-96. Data from the Royal Navy is also included from April 1976, May 1987, and April 1991. A map tracing the path followed for obtaining the data is available at the site. Data for this set is available via FTP.