NDBC THREDDS Server Catalog https://dods.ndbc.noaa.gov/thredds/catalog/data/swden/svls1/catalog.html

Dataset Size Last Modified
     Folder  svls1   --
         svls1w1996.nc 5.997 Mbytes 2006-01-19T20:28:24Z

National Data Buoy Center THREDDS Server at National Data Buoy Center see Info
THREDDS Data Server [Version 4.6.14 - 2019-07-23T11:04:31-0600] Documentation