{ "items" : [
    { "id" : "http://dbpedia.org/resource/Navigational_instrument"
      "properties" : {
        "http://www.w3.org/2000/01/rdf-schema#comment" : [ "Navigational instruments refers to the instruments used by nautical navigators and pilots as tools of their trade. The purpose of navigation is to ascertain the present position and to determine the speed, direction etc. to arrive at the port or point of destination."] } } }
