It utilised, among other things, a set of sonobuoys. One of these sensors fell into Chinese hands in the South China Sea. The Yuyuan Tantian account, associated with the state-owned China Central ...

Many militaries, including China, use sonobuoys and acoustic sensors. Maritime patrol aircraft often use them and other detectors in open waters to track submarine movements and locations.

US-based Ultra Maritime and defence PSU Bharat Dynamics Limited (BDL) will co-produce sonobuoys, used for detecting underwater movement especially of submarines, for the Indian Navy at a facility ...