{"product_id":"whales-and-sonar-kristina-alexander-9781288665754","title":"Whales and Sonar: Environmental Exemptions for the Navy's Mid-Frequency Active Sonar Training Program","description":"Mid-frequency active (MFA) sonar emits pulses of sound from an underwater transmitter to help determine the size, distance, and speed of objects. The sound waves bounce off objects and reflect back to underwater acoustic receivers as an echo. MFA sonar has been used since World War II, and the Navy indicates it the only reliable way to track submarines, especially more recently designed submarines that operate more quietly, making them more difficult to detect.\u003cbr\u003e\u003cbr\u003e\u003cb\u003eAuthor:\u003c\/b\u003e Kristina Alexander\u003cbr\u003e\u003cb\u003eISBN-10:\u003c\/b\u003e 128866575X\u003cbr\u003e\u003cb\u003eISBN-13:\u003c\/b\u003e 9781288665754\u003cbr\u003e\u003cb\u003ePublisher:\u003c\/b\u003e Bibliogov\u003cbr\u003e\u003cb\u003eLanguage:\u003c\/b\u003e English\u003cbr\u003e\u003cb\u003ePublished:\u003c\/b\u003e 01\/28\/2013\u003cbr\u003e\u003cb\u003ePages:\u003c\/b\u003e 22\u003cbr\u003e\u003cb\u003eFormat:\u003c\/b\u003e Paperback\u003cbr\u003e\u003cb\u003eWeight:\u003c\/b\u003e 0.13lbs\u003cbr\u003e\u003cb\u003eSize:\u003c\/b\u003e 9.69h x 7.44w x 0.05d","brand":"Kristina Alexander","offers":[{"title":"Paperback","offer_id":47611361100031,"sku":"9781288665754","price":14.75,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0662\/2982\/9887\/files\/img_46f8f02f-6c85-4d92-abaa-7f7982ef6544.jpg?v=1764513393","url":"https:\/\/www.whiterainbookhouse.com\/products\/whales-and-sonar-kristina-alexander-9781288665754","provider":"WR Book House","version":"1.0","type":"link"}