@prefix cpm: . @prefix dc: . @prefix dcat: . @prefix dce: . @prefix dct: . @prefix dcterms: . @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 sdo: . @prefix semapv: . @prefix skos: . @prefix sssom: . @prefix void: . @prefix xsd: . rdf:type sdo:DefinedTerm ; sdo:description "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 ; sdo:inDefinedTermSet ; sdo:name "British Antarctic Survey Acoustic Towfish"@en ; sdo:termCode "SDN:L22::TOOL1202" .