@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: . skos:member . skos:altLabel "CEFAS 4m beam trawl" , "CEFAS 4m beam trawl"@en ; skos:broader , ; skos:definition "This is the standard net used by the CEFAS fisheries laboratory for beam trawl surveys in UK coastal waters. The net is held open by a 4m (measured inside the end plates) metal beam with a chain mat attached to the beam to increase seabed disturbance. 75mm cod ends were optionally fitted with 40mm liners. Post-1991 80mm (post-1991) cod ends were always fitted with 40mm liners."@en ; skos:inScheme ; skos:notation "SDN:L22::TOOL0652" ; skos:note "accepted"@en ; skos:prefLabel "CEFAS 4m survey beam trawl"@en . skos:narrower . skos:narrower . skos:narrower . skos:narrower .