The "uot_hdlines" collection contains temperature and salinity
profiles from the WOCE "Upper Ocean Thermal Programme" for the high
density lines. For this collection, the data have been sub-sampled to
approximately 1 m vertical resolution. Data that have passed data
center quality control procedures can be identified by the characters
"dc" as first part of the cruise label, whereas data that have passed
more stringent quality control procedures at science centers are
denoted by "sc" in the cruise-label. Use the ODV Selection Criteria,
if you want to sub-set the "uot_hdlines" collection.

For more information see the "woce-uot" directory of the WOCE Global
Data, Version 3.0 disks.