@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:narrower . skos:narrower . skos:altLabel "" ; skos:broader ; skos:definition "Wires, usually several thousand feet in length, maintained horizontally at any desired depth by means of attached weights, buoyed at intervals, towed by a power boat at each end, and used to locate submerged obstructions projecting above the depth at which it is set."@en ; skos:inScheme ; skos:notation "SDN:L05::WDRG" ; skos:note "accepted"@en ; skos:prefLabel "Wire drags"@en .