AN/AQS-13 Dipping sonar deployed from an H-3 Sea King Underwater communications Dedicated sonars can be fitted to ships and submarines for underwater communication. Source: Internet
Four of the ships were upgraded with the addition of an eight-cell Mk 41 VLS with 32 Evolved Sea Sparrow (ESSM) missiles, and the Standard Missile SM-2, plus upgraded radars and sonars while the other two ships were decommissioned. Source: Internet
Because of the problems of ship noise, towed sonars are also used. Source: Internet
Frequencies and resolutions The frequencies of sonars range from infrasonic to above a megahertz. Source: Internet
In 1940, the US sonars typically consisted of a magnetostrictive transducer and an array of nickel tubes connected to a 1-foot-diameter steel plate attached back to back to a Rochelle salt crystal in a spherical housing. Source: Internet
In addition, the goal was to take advantage of modern sonars with a much larger detection range. Source: Internet