A
booster charge screws into the base of the mine. The cap of
the booster may be extended into a plastic spike as shown above.
This was intended to prevent mine movement after placement.
Although
the metal content seems relatively large, it has proven particularly
difficult to detect with a metal-detector. The picture below
shows the metal content, comprising three ball bearings, a coil-spring,
a pin and an aluminium-alloy cased detonator.
