| Equipment performance report for the Drifting Acoustic Spar Buoy Recorder (DASBR) - :4925 | National Marine Fisheries Service (NMFS)
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Equipment performance report for the Drifting Acoustic Spar Buoy Recorder (DASBR)
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  • Description:
    "The Drifting Acoustic Spar Buoy Recorder (or DASBR) is an autonomous Passive Acoustic Monitoring (PAM) system developed at the Southwest Fisheries Science Center (SWFSC) to provide a practical, low-cost option for collecting high-quality marine acoustic data. Most autonomous recording systems (such as Cornell's Pop-ups and SIO's HARPS) are bottommounted and therefore limited to shelf and slope waters. Fixed moorings in deep pelagic waters are generally too expensive for common use. Hydrophone arrays towed behind research vessels are often used to acoustically detect odontocetes in deeper waters, but they are not ideal. Ship time for towed array surveys is expensive, while ship and water flow noise prevent the collection of ambient noise data using towed arrays. Drifting recording units, such as DASBRs, are not limited to shallow waters, can record deep within the water column, and are isolated from ship noise and flow noise. Here we present the results of three DASBR field tests including two Passive Acoustic Sea Trials (PAST 2013 & PAST 2014) and the 2014 NOAA R/V Lasker shakedown mission trial. We discuss bioacoustic detections of marine mammals and alterations to the original design that were required to prepare the DASBRs for subsequent long-term deployments."--Introduction. [doi:10.7289/V5/TM-SWFSC-543 (http://dx.doi.org/10.7289/V5/TM-SWFSC-543)]

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