fixed subsurface vertical profiler A platform that periodically makes an automated vertical traverse of the water column at a predetermined fixed location. (e.g. YSI vertical profiler, HOMER CTD). 2013-08-20 13:53:41.0 SDN:L06::45 SDN:L06::45 SDN:L06::45 2 2 2013-08-20 13:53:41.0 accepted false