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AN/SSQ-77 VLAD (Vertical Line Array DIFAR)

Country of Origin: USA


The AN/SSQ-77B VLAD (vertical line array DIFAR) is a directional frequency analysis and recording sonobuoy based on the AN/SSQ-53; it is a deep-searching passive system that was developed for search and surveillance in high-clutter environments.

A parachute stabilizes and slows the buoy's descent during launching from aircraft. The lead chloride battery activates upon impact with seawater. Gas-filled cylinders inflate after activation of the battery. The cylinders provide...

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