Submarines survive by exploiting how sound moves through the ocean, from passive sonar and anechoic tiles to thermoclines, shadow zones, and ultra-quiet propulsion. This explains the physics, ...

The Prairie-Masker system is a two-part underwater noise reduction system used by U.S. Navy surface ships and submarines. It's designed to make vessels harder to detect by passive sonar, which listens ...

The Universal Acoustic Range and Processor (UARP) was developed to address the need for a reliable low cost method to provide harbor surveillance of surface and subsurface vessels. This turn-key ...

Israeli underwater technology group DSIT Solutions has lifted the curtain on a new compact multimission, multiarray sonar ...

The new system relies heavily on passive acoustics—technology that simply listens, rather than sending out signals of its own such as sonar pings. Australia is building an integrated undersea ...