if something is used for a process, then that something visibility that 1
communication_device is artifact_used_for_communication. communications_system is artifact_used_for_communication. used_thing is artifact. aeroplane_used_for_surveyings is tangible_thing. marking is visual_information_source. visual_range is visibility. artifact_used_for_communication is piece_of_technology. database_searching is use_of_device. visibility is clearness. visibility is non_aspectual_quantity.