@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:related . skos:related . skos:narrower . skos:narrower . skos:narrower . skos:narrower . skos:altLabel "EA501P echosounder" , "EA501P echosounder"@en ; skos:broader , ; skos:definition "A single-beam, single-frequency, portable echosounder for bottom detection. It is housed in an aluminium casing and can be fitted with one of several transducer at differing frequencies (38, 49, 120, 200 and 710 kHz). Maximum depth detection is 1900 m in sewater and 3000 m in freshwater."@en ; skos:inScheme ; skos:notation "SDN:L22::TOOL0814" ; skos:note "accepted"@en ; skos:prefLabel "Simrad EA501P echosounder"@en ; skos:related .