Bulgarian anti-helicopter mines
series of land mines
The 4AHM-100, AHM-200, AHM-200-1, AHM-200-2, PMN-150, and PMN-250 are Bulgarian directional fragmentation mines that can be used with proximity fuzes to function as anti-helicopter mines.
Description
The systems were developed by the Bulgarian Institute of Metal Science, and are based around electronic fuzes with broadly similar functionality. The fuzes use two sensors. The first, an acoustic sensor, arms the mine as a helicopter approaches. The second sensor is a radar, which locates the target and triggers the mine at the appropriate point. The mines all use a number of large Misnay-Schardin effect warheads to project large numbers of fragments to an effective range of around 200 meters. Jane's Mines and Mine Clearance speculates that IFF could be integrated into the fuze circuit to discriminate against friendly aircraft, lowering the chances of friendly fire.
Mines
PMN-150 and PMN-250
The PMN-150 and PMN-250 are large directional fragmentation mines that scatter fragments in a 60 degree horizontal arc. The PMN-150 produces approximately 1,500 fragments that have an effective range of 150 meters. The PMN-250 is a larger mine which produces 2,100 fragments that have an effective range of 250 meters.
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