The TIDAS 900 vertical component will contain the following instrumentation: a T-thermistor chain with 12 temperature sensors placed at 1 meter intervals; two YSI 6600 series mounted with temperature, turbidity, pH, DO, conductivity, chlorophyll and blue-green algae; one Cyclops-7 CDOM sensor; and one bottom mounted upward looking Nortek Automated Wave And Current meter (AWAC) acting as a current profiler, a wave directional system and ice thickness detector all in one unit. All data will be transmitted in a digital format to a Campbell data logger housed in the mainframe buoy.