Please note that the content of this book primarily consists of articles available from Wikipedia or other free sources online. The M139 Volcano mine system is a US highspeed landmine laying system. It can lay a minefield one kilometer long, containing 960 mines in 43 seconds from a ground vehicle, and in just 17 seconds from a helicopter. The system uses GATOR mines, though since 1993 the system deploys only anti-tank mines (originally 1/6 of the mines were anti-personnel).M814 5 tonne truck. M548A1 tracked carrier.