TR/9 trip mine
From Halopedia, the Halo wiki
The TR/9 Antipersonnel Mine (TR/9 AP Mine), commonly known to UNSC forces as the trip mine, "Tripper", "Skippy", "Automatic Guard", "Invisible Fence" or simply "Mine", is a landmine employed by Jiralhanae forces.
The TR/9 takes a circular form, with six fins protruding off the side. The centre of the disc has another four fins that, when the mine is activated, rotate upward. The mine's activation also sees it light up and emit a high-pitched beeping noise. The mine can use trip wires or laser beams to trigger the detonator, when something large enough gets within range.
The tripmine is employed for defensive usage, and is used in siege warfare and guerrilla tactics. They are used in the defence of perimeters or placed alongside enemy paths.
The TR/9 trip mine was predominantly employed by Covenant loyalist Jiralhanae forces during the later stages of the Human-Covenant War. Jiralhanae equipped with these mines were deployed during the Battle for Earth and Battle of Installation 00 in late 2552. In the post-war era, Jiralhanae Jumpers allied with Merg Vol's Covenant and the Banished have been known to employ trip mines.
In earlier stages of development, the trip mine in Halo 3 had a Covenant-themed texture, featuring purple metal and blue lights. This cut variant can be found in the files of the Halo 3 Beta, though unused. In the Halo 3 Beta, deployed trip mines could stick to the bottom of a motionless vehicle. If the vehicle then moved, the mine would explode, killing all players inside of it.
List of appearances