Hydrophone submarine detection, World War I. British Royal Navy lieutenant operating a hydrophone listening device on board an armed trawler that is on anti-submarine patrol during World War I (1914-1918). A hydrophone is an underwater microphone, being used here to detect the sound of a submarine's engines. The headphones are being used to listen, while the microphone has been lowered into the water (lower right). For a hydrophone in use, see image C036/0820. | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / US Navy |
Bildgröße: | 5346 px × 3366 px |
Modell-Rechte: | nicht erforderlich |
Eigentums-Rechte: | nicht erforderlich |
Restrictions: | - |