@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @prefix grg: . @prefix iop: . @prefix ns0: . @prefix ns1: . @prefix owl: . @prefix pav: . @prefix prov: . @prefix puv: . @prefix qudt: . @prefix rdf: . @prefix rdfs: . @prefix reg: . @prefix semapv: . @prefix skos: . @prefix sssom: . @prefix void: . skos:member . skos:related . skos:narrower . skos:altLabel "Rockland GEMCM" , "Rockland GEMCM"@en ; skos:broader , ; skos:definition "A geo-electromagnetic current meter based upon Stanford et al. (1978). The instrument measures the variations of horizontal velocity between the sea surface and bottom, based on the measurement of electric currents generated by the motion of the seawater through the Earth's magnetic field. The GEMCM supports a completely isolated measurement of the battery voltage in an instrument system and 2-component signals from a geo-electro-magnetic current meter. The instrument carries a 3-axis magnetometer that can be used as a compass. All outputs are digital and connect to the serial instrument bus."@en ; skos:inScheme ; skos:notation "SDN:L22::TOOL0643" ; skos:note "accepted"@en ; skos:prefLabel "Rockland Scientific Geo-electro magnetic current meter (GEMCM)"@en ; skos:related . skos:narrower . skos:narrower . skos:narrower . skos:related .