http://www.rssboard.org/rss-specification 720 XTF Search Results (docsPerPage=100;f98-subject=Aids to navigation) http://norton.wrhs.org/collections/search?docsPerPage%3D100;f98-subject%3DAids%20to%20navigation Results for your query: docsPerPage=100;f98-subject=Aids to navigation Thu, 01 Jan 1970 12:00:00 GMT Radio navigational aids 1947: marine direction-finding stations, radiobeacons, time signals, navigational warnings, distress signals, medical advice and quarantine, Loran, weather, and radio regulations for territorial waters. United States Hydrographic Office. http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc http://norton.wrhs.org/collections/view?docId=marc/skclmarc202890322046876.mrc Thu, 01 Jan 1970 12:00:00 GMT