What is the function of the directional hydrophone in a DICASS sonobuoy?

The function of the directional hydrophone in a DICASS (Directional Command Activated Sonobuoy System) sonobuoy is to pinpoint the location of underwater objects. The directional hydrophone is designed to detect and measure sound waves emanating from various sources underwater, such as submarines or other marine life. By utilizing its capability to detect sound in specific directions, the hydrophone can provide more accurate information on the bearing of underwater noises, which is crucial for effective anti-submarine warfare and ocean surveillance.

In this context, the directional nature of the hydrophone allows operators to determine not only that a sound is present but also its direction relative to the buoy’s position, thereby enhancing the ability to locate and track submerged targets. Thus, the directional hydrophone plays a vital role in the effectiveness of the DICASS system, contributing directly to mission success in maritime operations.