Submarine Warfare in WWII (methods used by German U-boats to avoid sonar detection)
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- čas přidán 1. 07. 2021
- “The British and US Navy used ASDIC - known as SONAR in America - to detect submerged German Raiders - whilst RADAR was used to pin-point surfaced U-Boats.
Active sonar ‘transmits’ pulses of sound from the ship which, when received back as an echo, indicates the position of a nearby submerged craft. Passive sonar ‘listens’ for underwater sound and picks up the noise of a submarine engine or noise within it.
Sonar detection meant that a submerged enemy submarine could be depth charged and potentially killed.
Early in WW2 some German U-boats were covered with Anechoic rubber tiles in order to avoid sonar detection but these were unsuccessful so German scientists continued to experiment with alternative materials.
This video showcases a unique surviving section of the Top Secret synthetic rubber sheeting that Germany eventually developed to coat the outer hulls of a few of their U-boats in order to avoid sonar detection.
The book, Sound of the Waves, A WW2 Memoir, How scientists worked to defeat the U-boat threat during the Battle of the Atlantic by E.A. Alexander, explains how this came about.
Alexander destroys the myth that - although British intelligence and the British Navy knew of this project - the British Admiralty did not know the purpose of the rubber coating on German U-boats. The memoir also explains how anti-submarine detection devices in miniature submarines known as X-craft were used to attack the German battleship KMS Tirpitz and aided the D-Day landings, fleshing out secret events in WW2 naval history. “
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It amazes me that the British never considered putting SONAR outside the ship on the port and starboard and to the front and rear, each beeping a different tone and having two ship listeners, one for port/starboard the other for front/rear allowing for far more accurate detection of the u boat, it also amazes me that the Germans never considered releasing small underwater sirens to intermittently blast out ear piercing noises to prevent ship listeners accurately hearing SONAR.
The Germans did use sonar decoys.