@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: . rdf:type skos:Concept ; dce:identifier "SDN:L22::TOOL1202" ; dc:date "2018-01-30 16:59:47.0" ; dc:identifier "SDN:L22::TOOL1202" ; dc:isVersionOf ; pav:authoredOn "2018-01-30 16:59:47.0" ; pav:version "1" ; void:inDataset ; owl:deprecated "false" ; owl:versionInfo "1" ; skos:altLabel "BAS Acoustic Towfish" ; skos:broader , ; skos:definition "An acoustic towfish developed by the British Antarctic Survey, built to carry a set of transducers (38 kHz split beam, 120 kHz split beam, 200 kHz single beam) and to be towed in 20 m to 30 m depth. This instrument was design to sample in the 'blanking zone' of ship-mounted echosounders, an area in the water column where air bubbles and acoustic noise corrupt the echosounder's measurements."@en ; skos:notation "SDN:L22::TOOL1202" ; skos:note "accepted"@en ; skos:prefLabel "British Antarctic Survey Acoustic Towfish"@en ; skos:related .