A Mooring Riser is the cable (or chain) that connects the buoy to the anchor on a mooring. Instruments can be affixed to the mooring riser at fixed depths, or a wire-following profiler can track along the mooring riser traveling up and down in the water column. Mooring Risers can also be inductive cables, which allows instruments attached to them to transfer data up the mooring riser to the data logger in the surface buoy.