Mines are a deployable explosive used by the Doombringer class in Tribes: Ascend. They can be unlocked for 420 Gold or 75000 XP.
Operation
Mines explode when an enemy player moves within range, but ignore teammates. They deal 700 damage. Although they do not explode when their owner steps on them, they will deal self-damage if an enemy sets them off while in range. Mines can be destroyed by explosive weapons and can also destroy other mines if deployed too close together. Once deployed an icon will appear in the bottom left of the player's HUD until the mine is destroyed.
Tactics
Mines are primarily defensive weapons. They are usually deployed inside the base or around the flag stand. Mines are small and can be easily hidden behind objects or corners to surprise unsuspecting Infiltrators. They can also be deployed just beneath the crest of a hill or ramp where enemies are expected to travel. A good example of this is on the map Katabatic where the generator can be accessed by a ramped tunnel. Enemy players will often ski across the map to quickly attack the generator via this tunnel, but cannot easily fire on the ramp to clear any mines.
Because mines must be unlocked in addition to unlocking the Doombringer class, they are not deployed in base defense as often as Turrets or Force Fields. This means that enemy players will often forget to check for mines in favor of quickly moving through the base. Placing mines in different locations throughout a match means that any player you have killed with a mine will not be expecting the next one. Also, Doombringers should remember that when a player dies they see the player that killed them for several seconds before they respawn and will see where you hide replacement mines during this time.
As of Version 1.0.1185 the detection radius of the Mines has been nerfed by 10%.