The sonar transducer (Figure 1-12-10) which comprises a transmitting array (projector) and a receiving array (hydrophone) converts electronic pulses from the transmitter to acoustic pulses for radiation through the water, and, in the receiver mode converts acoustic pulses to low level AC signals. The transducer is raised and lowered by the hydraulic cable reeling machine.

The projector assembly of the transducer contains a projector, a flux-gate compass, and a pressure potentiometer. The projector is composed of six matched ceramic rings and a tuning transformer to convert the electrical pulses from the sonar transmitter to acoustic pulses that are radiated in an omnidirectional pattern through the water. The flux-gate compass forms a portion of the display stabilization loop, providing an output to indicate the sonar transducer magnetic azimuth. The pressure potentiometer provides an output to indicate depth of the transducer in water. The projector is covered with a black neoprene boot that is filled with oil. The hydrophone assembly consists of 16 stave assemblies bolted to a corklined fibreglass barrel, an end bell, a temperature sensor, and an electronic package. The staves, filled with oil and hermetically sealed during assembly, convert the received acoustic pulses to low level, AC signals that are amplified and applied through the special purpose electrical cable to the receiver located in the aircraft. The temperature sensor measures the temperature of the surrounding water. Built-In Test Equipment (BITE) functions are included within the transducer circuitry.