Profiler Moorings are a type of mooring that contain instruments fixed to profilers that move up and down the water column. Profilers either track along the mooring riser (wire-following profilers), or are tethered to a mooring-mounted winch that pays out line allowing the profiler to move through the water (shallow profilers & surface piercing profilers). Instruments may also be attached to the mooring riser or affixed to an underwater platform on these moorings.