"seamark:radar_station:category"=>"surveillance","seamark:type"=>"radar_station","tower:type"=>"radar"
"seamark:type"=>"signal_station_traffic","seamark:signal_station_traffic:category"=>"lock"
"seamark:type"=>"signal_station_traffic","seamark:signal_station_traffic:category"=>"lock"
"tower:type"=>"radar","seamark:type"=>"radar_station","seamark:radar_station:category"=>"surveillance"
"seamark:type"=>"signal_station_traffic","seamark:signal_station_traffic:category"=>"lock"
"seamark:type"=>"signal_station_traffic","seamark:signal_station_traffic:category"=>"lock"