A mine countermeasure device for disabling an undersea mine, and underwater transport, and methods therefor. The mine countermeasure device operates to mask, cancel or neutralise (detonate) the undersea mine. The mine countermeasure device is deployed, together with a plurality of other mine countermeasure devices from an underwater transport, for example autonomously. The underwater transport preferably carries out a scan of an area known to be mined, in order to identify undersea mines. The underwater transport is capable of autonomous operation over the horizon to deliver plurality of mine countermeasure devices. The mine countermeasure device targets particular sensors on the undersea mines.

A mine countermeasure device for disabling an undersea mine, and underwater transport, and methods therefor. The mine countermeasure device operates to mask, cancel or neutralise (detonate) the undersea mine. The mine countermeasure device is deployed, together with a plurality of other mine countermeasure devices from an underwater transport, for example autonomously. The underwater transport preferably carries out a scan of an area known to be mined, in order to identify undersea mines. The underwater transport is capable of autonomous operation over the horizon to deliver plurality of mine countermeasure devices. The mine countermeasure device targets particular sensors on the undersea mines.