The seabed base will be five scalar hydrophones, according to the pre-set orientation and distance arranged on the seabed, so that multiple hydrophones can monitor an event at the same time, which can effectively eliminate background noise, and can more effectively analyze the acoustic signal, so as to achieve more accurate event identification. In addition, the five-primitive hydrophone array can also determine the orientation of the sound source.

The seabed base is equipped with five hydrophone primitives, and there are two acoustic release processes. In the first release, the five primitives are detached from the seabed base to reach the seabed; in the second release, the seabed base is detached from the anchor, and the seabed base floats to the surface according to its own buoyancy. The primitives released before are tied to the seabed base under the action of the rope to realize data recovery.

The two releases of the five-element sea-bed base were carried out by electrocorrosion. The specific structure of the release mechanism for the second release is shown in the figure above. After the fuse is disconnected, the connecting rod and the lever move downward, causing the hook to break away from the pull ring of the sink coupling frame, so as to realize the separation of the frame and the anchor.