abstract:A rotor current meter (RCM) is a mechanical current meter, an oceanographic device deployed within an oceanographic mooring measuring the flow within the world oceans to learn more about ocean currents. Many RCMs have been replaced by instruments measuring the flow by hydroacoustics, the so-called Acoustic Doppler Current Profilers.
Practicalproblems concerning directcurrent measurement in very shallow water including thedynamicequationandperformanceof a rotor type currentmeter are discussedin this paper.