| Gruppenhorchgerät (GHG) |
| Location of Gruppenhorchgerät (GHG) Microphones on Bismarck & Tirpitz |
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| Gruppenhorchgerät (GHG) Microphones - Close Up |
Gruppenhorchgerät (GHG) - Information |
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The Gruppenhorchgerät (GHG) is a Sound Locator System. |
| Manufacturer of the Gruppenhorchgerät (GHG) |
| Atlas-Werke, Bremen, Germany |
| Type of the Gruppenhorchgerät (GHG) |
| AN 301m |
| Number of Microphones installed |
| 2 x 62 crystal microphones (port - and starboard bow) |
| Purpose of the Gruppenhorchgerät (GHG) |
| The purpose of the Gruppenhorchgerät (GHG) was to detect noise from submarines, surface ships and torpedoes. With the Gruppenhorchgerät (GHG) it was possible to detect a vessel's engine type, propeller speed and course of vessel or torpedo. |
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