"tower:type"=>"radar","seamark:type"=>"radar_station","seamark:radar_station:category"=>"surveillance"
"operator"=>"Port of Rotterdam","tower:type"=>"radar","seamark:type"=>"radar_station","seamark:radar_station:category"=>"surveillance"
"tower:type"=>"communication","seamark:type"=>"radio_station","dgps:frequency"=>"312.5 kHz","communication:dgps"=>"yes","seamark:radio_station:category"=>"dgps","seamark:radio_station:frequency"=>"312500"
"tower:type"=>"radar","seamark:type"=>"radar_station","seamark:radar_station:category"=>"surveillance"
"seamark:name"=>"LL 112 GR. HOOG","seamark:type"=>"beacon_special_purpose","seamark:source"=>"https://geoservices.rijkswaterstaat.nl/apps/geoserver/vaarweg_markeringen/ows?service=WFS&version=1.1.0&request=GetFeature&typeName=vaarweg_markering_drijvend&outputFormat=csv Date:2020-02-20","tower:construction"=>"free_standing","seamark:light:1:colour"=>"white","seamark:light:1:height"=>"21","seamark:light:1:period"=>"6","seamark:light:reference"=>"B 0646.75","seamark:light:1:category"=>"directional","seamark:light:1:sequence"=>"4+(2)","seamark:light:1:character"=>"Oc","seamark:light:1:exhibition"=>"24h","seamark:light:1:orientation"=>"112","seamark:beacon_special_purpose:colour"=>"grey","seamark:beacon_special_purpose:category"=>"leading"
"tower:type"=>"radar","seamark:type"=>"radar_station","tower:construction"=>"free_standing","seamark:radar_station:category"=>"surveillance"
"tower:type"=>"radar","seamark:type"=>"radar_station","seamark:radar_station:category"=>"surveillance"
"tower:type"=>"radar","seamark:type"=>"radar_station","seamark:radar_station:category"=>"surveillance"
"tower:type"=>"radar","seamark:type"=>"radar_station","seamark:radar_station:category"=>"surveillance"