Vydavatel National Oceanic and Atmospheric Administration, Department of Commerce
Datum vydání před více než 9 roky
US
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Cetacean surveys are conducted aboard small vessels (19-41 ft) in order to collect photos, biopsy samples, and acoustic recordings and to deploy satellite tags. Surveys are conducted with three to eight observers scanning 360 degrees around the vessel using unaided eye or 7-10x binoculars.