Deploying CTD - hoisting
AB Bryce Bennett is pictured here deploying the first CTD of the voyage. The 24 Niskin bottles attached to the CTD rosette are cocked and ready to be closed at various depths throughout the water column. These will collect water samples, which will be filtered or preserved for a whole variety of different analyses by scientists onboard. The CTD measures the water column properties of conductivity (salinity), temperature, and depth (pressure).