/" class="sf-depth-4">dsg_trajectories</a></li><li id="menu-1247-1" class="last odd sf-item-9 sf-depth-4 sf-no-children"><a href="https://ferret.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="users-guide/variables-xpressions.html" class="sf-depth-3 menuparent">3. Variables &amp; Expressions</a><ul><li id="menu-1248-1" class="first odd sf-ite