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ozm
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The OZM-3, OZM-4 and OZM-72 are Soviet manufactured bounding type anti-personnel mines.
(fragmentation-barrier mine, in the Russian and other post-Soviet armies as informally called "frog mine" or "witch" )
They are normally painted olive green, and issued with a spool of tripwires and two green painted wooden or metal stakes for affixing the tripwires. Both OZM-3 and OZM-4 have cast iron fragmenting bodies while the OZM-72 also contains preformed steel fragments, and all three are issued with empty fuze wells, so a variety of fuzing options are possible.
Operation
The mines can be activated by a variety of fuzes, including electronic fuzes or command initiation, although they are most commonly fitted with an MUV booby trap switch which is activated by a tripwire.
On firing, a metal base plate remains in the ground, while the mine body is thrown up by a small lifting charge, but remains attached to a strong wire tether. When the end of the tether is reached at a height of approximately 0.5 m, the main charge explodes and scatters fragments of the casing across a wide area.
OZM mine may sometimes be laid directly on top of an MS-3 mine. The MS-3 is an anti-handling device which closely resembles a PMN mine, except that it has a "blister" on top and operates purely as a pressure-release boobytrap. Lifting an OZM mine (without rendering safe the MS-3 placed underneath) will trigger detonation.
Variants
= OZM-3
== OZM-4
== OZM-72
=Ottawa Treaty
Since the Ottawa Treaty, a number of countries have decided to retain their OZM mines, but convert them to command detonation only by destroying all fuzes which can be indiscriminately activated – potentially by non-combatants or animals. Belarus in particular has decided to keep 200,000 OZM-72.
See also
Valmara 59 – (Italy)
Valmara 69 – (Italy)
PROM-1 – (Yugoslavia)
M16 mine – (United States)
Land mine