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![Whales and Sonar: Environmental Exemptions for the Navy's Mid-Frequency Active Sonar Training Program by Kristina Alexander](https://558130.bdp32.group/rails/active_storage/representations/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBBeWR5amc9PSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--104ddee067a1634a9bbf53eb9fbb5936ebfd18a3/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaDdCem9MWm05eWJXRjBTU0lJYW5CbkJqb0dSVlE2RkhKbGMybDZaVjkwYjE5c2FXMXBkRnNIYVFJc0FXa0M5QUU9IiwiZXhwIjpudWxsLCJwdXIiOiJ2YXJpYXRpb24ifX0=--038335c90cf75c275ae4d36968ac417dc4a0a3e3/Whales%20and%20Sonar-%20Environmental%20Exemptions%20for%20the%20Navy's%20Mid-Frequency%20Active%20Sonar%20Training%20Program.jpg)
22 pages • missing pub info (editions)
ISBN/UID: 9781288665754
Format: Paperback
Language: English
Publisher: Bibliogov
Publication date: 28 January 2013
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 ...
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![Whales and Sonar: Environmental Exemptions for the Navy's Mid-Frequency Active Sonar Training Program by Kristina Alexander](https://558130.bdp32.group/rails/active_storage/representations/redirect/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaHBBeWR5amc9PSIsImV4cCI6bnVsbCwicHVyIjoiYmxvYl9pZCJ9fQ==--104ddee067a1634a9bbf53eb9fbb5936ebfd18a3/eyJfcmFpbHMiOnsibWVzc2FnZSI6IkJBaDdCem9MWm05eWJXRjBTU0lJYW5CbkJqb0dSVlE2RkhKbGMybDZaVjkwYjE5c2FXMXBkRnNIYVFJc0FXa0M5QUU9IiwiZXhwIjpudWxsLCJwdXIiOiJ2YXJpYXRpb24ifX0=--038335c90cf75c275ae4d36968ac417dc4a0a3e3/Whales%20and%20Sonar-%20Environmental%20Exemptions%20for%20the%20Navy's%20Mid-Frequency%20Active%20Sonar%20Training%20Program.jpg)
22 pages • missing pub info (editions)
ISBN/UID: 9781288665754
Format: Paperback
Language: English
Publisher: Bibliogov
Publication date: 28 January 2013
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 ...