The Augur Array. A tall sensor-mast bristling with dish-augurs and scanning vanes, sweeping the battlefield in slow mechanical arcs. While a friendly Skitarii fighter is within 3" of the Augur Array, enemy hidden setup is negated for all enemy fighters within 12" of the mast, which are treated as revealed. While within 3" of the Array, a friendly Skitarii also ignores the −1 to-hit penalty for firing at Long range against any target within 12" of the mast. Only one fighter need stand within 3" for the Array to remain active.
Codex · Adeptus Mechanicus
Terrain2
The Radium Cache. A shielded munitions store of rad-tipped magazines and galvanic cells, its warning-runes long since ignored by fighters who breathe worse with every passing day. A friendly Skitarii fighter that ends its activation in base contact with the Radium Cache may upgrade a single ranged weapon it carries to gain the Rad-phage trait for the rest of the battle; a given fighter may do this only once. In addition, a friendly Skitarii within 3" of the Radium Cache re-rolls its failed Ammo checks.