PDM (series of amphibious mines)

It is normally deployed in water one or two meters deep, and has a central fixing point for a tilt rod.

A Bulgarian version of the PDM-1M exists that is substantially developed from the original it uses a plastic cased mine, with a concrete base and a programmable fuse.

The mine can be mechanically laid and recovered, and can operate in 0.8 to 2 meters of water.

The mine has a large base plate, which it is fixed to by a pole, and four suspension wires.

The tilt fuzes can be set for contact detonation or to trigger once they reach a certain deflection.