Plate 67 of 87 · Class VIII, Ships & submarines

Hydrophone

An underwater microphone used to detect the noise of a submarine's engines or propellers. Allied navies installed them on ships and in harbors from 1915, though their range and accuracy were limited.

Mentioned in

• Chapter XI War on Waves and Wings §4 The U-Boat War in Four Phases

Sources

Wikidata Q798062