{"product_id":"wwii-1943-usaaf-an-apn-1-apn-1a-apn-1b-aircraft-radio-altimeter-manual","title":"WWII 1943 USAAF AN\/APN-1 APN-1A APN-1B Aircraft Radio Altimeter Manual","description":"\u003cp\u003e\u003cspan\u003eOriginal-looking \u003c\/span\u003e\u003cspan\u003eWorld War II U.S. Army Air Forces technical manual dated November 1, 1943\u003c\/span\u003e\u003cspan\u003e, titled \u003c\/span\u003e\u003cspan\u003eHandbook of Operating Instructions for AN\/APN-1, AN\/APN-1A and AN\/APN-1B Aircraft Radio Altimeter Equipments.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThis wartime publication provides operating instructions for early aircraft radio altimeter systems used to determine an aircraft’s altitude above the terrain.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eThe manual features the original \u003c\/span\u003e\u003cspan\u003eRESTRICTED – FOR OFFICIAL USE ONLY\u003c\/span\u003e\u003cspan\u003e designation and includes security notices for both American and British military personnel.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eAn interesting surviving example of WWII aviation electronics documentation covering early airborne radar and radio navigation technology.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eFREE SHIPPING\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003e#8\u003c\/span\u003e\u003c\/p\u003e","brand":"Whiskey Rebellion Antiques","offers":[{"title":"Default Title","offer_id":67719793311821,"sku":null,"price":40.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0610\/9229\/8829\/files\/IMG-1771.heic?v=1792238537","url":"https:\/\/whiskeyrebellionantiques.com\/products\/wwii-1943-usaaf-an-apn-1-apn-1a-apn-1b-aircraft-radio-altimeter-manual","provider":"Whiskey Rebellion Antiques","version":"1.0","type":"link"}