1. A system for detecting underwater buried objects comprising: an acoustical camera adapted to produce three dimensional volumetric images of an underwater target area volume of an underwater floor; an acoustic transducer adapted to apply an acoustic pulse to the target area volume so as to cause displacement of materials included in the target area volume; and a controller adapted to coordinate operation of the camera and the acoustic transducer, wherein a first volumetric image of the target area volume is produced before the acoustic pulse is applied, and a second volumetric image of the target area volume is produced while the acoustic pulse is present in the target area volume.