 The fuze is air pressure driven with pressure on the top plate of the mine forcing air into a diaphragm which exerts pressure on the striker.Shocks from overpressure are too short to inflate the diaphragm; additionally the striker must first rotate a locking collar before it can activate the mine, this requires gradual pressure giving even greater resistance to shock.The sealed nature of the mine means that it can be deployed in up to 1 meter of water.