"Aanderaa RCM 4/5 Recording Current Meter"@en . . "SDN:L22::TOOL0211" . "Family of self-recording current meters with Savonius Rotors recording averaged speed and a magnetic compass recording spot directions. The meter has a balanced weight vane which aligns it with the current flow and is mounted using shackles between segments of mooring line. Optional temperature, pressure and conductivity sensors may be fitted. The RCM5 has a strengthened casing allowing deployment to 6000m. For more details see http://www.bodc.ac.uk/data/documents/nodb/4872/"@en . .