rret.pmel.noaa.gov/Ferret/" class="sf-depth-4">dsg_profiles</a></li></ul></li><li id="menu-1392-1" class="middle odd sf-item-5 sf-depth-3 sf-total-children-5 sf-parent-children-0 sf-single-children-5 menuparent"><a href="../variables-xpressions.html" class="sf-depth-3 menuparent">3. Variables &amp; Expressions</a><ul><li id="menu-1248-1" class="first odd sf-item-1 sf-depth-4 sf-no-children"><a href="../variables-xpressions/VARIABLES.html" class="sf-depth-4">3.1 VARIABLES</a></li><li id="menu-1249-1" class="