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AbstractInstrumented, subsurface moorings deployed in the Scotian shelf and slope regions of the North Atlantic provide data in low to moderate flows for a current meter intercomparison. The primary instruments being evaluated are two acoustic Doppler single-point current meters, the Aanderaa Seaguard (SG) and the Teledyne RD Instruments (RDI) Doppler volume sampler (DVS), which are compared against older-generation single-point current meters and acoustic Doppler current profilers. Analysis showed that the root-mean-square (RMS) of the speed difference between concurrent instrument combinations was in the range of 1.0–1.6 cm s−1, which is about 3%–6% of the upper limit of speeds observed at these sites. Best agreement was between the DVS and the nearby Seaguard (RMS speed difference of 1.2 cm s−1), during the shelf deployment, and between the Aanderaa recording current meter 11 (RCM11) and the nearby Seaguard (1.0 cm s−1), during the slope deployment. Speed differences larger than 4 cm s−1 were uncommon,...

An Intercomparison of Acoustic Current Meter Measurements in Low to Moderate Flow Regions