Sensor Spines. Sensor spines are arrayed over a vehicle to allow it to detect a range of hazards. These sensors allow them to detect ambushes (Codex: Catachans, p.20) and secret deployment (Lictors, Codex: Tyranids, p.11). They may shoot and scan in the same Shooting phase. Additionally a vehicle fitted with sensor spines will only trigger a mine when passing over a minefield on a roll of 6.
Multi-tracker. The vehicle-mounted multi-tracker is combined with advanced stabilisers enabling a vehicle to fire as if it were a fast vehicle. Thus a vehicle can fire one weapon if moving up to 12", or all of its weapons if moving up to 6".
Targeting Array. Targeting arrays assist the vehicle gunner's aim by adjusting for the target's range and speed. Add 1 to the vehicle's BS.
Blacksun Filter. This is simply a vehicle-mounted version of the hard-wired blacksun filter. The vehicle rolls 4D6 x 3" for visibility distance when subject to the Night Fighting mission special rules and traces line of sight normally.
Gun Drones. A vehicle may be equipped with two gun drones. The drones will move with the vehicle, safely contained in specially designed recesses. During any Tau Movement phase, the drones may disengage in the same way as infantry dismount from a transport and form an independent unit. From then on, the drones function as a Drone squadron. The drones may not rejoin the vehicle during a game.
While attached, the gun drones may fire as part of the vehicle, using their own BS, in addition to any other weapons that would normally be permitted to fire, and are treated as passengers if the vehicle is damaged.
Flechette Discharger. Powerful clusters of reactive charges are attached to the prow of many Tau vehicles. If the vehicle moves into close proximity of an enemy they fire off vicious clouds of high velocity flechettes. If an enemy model elects to make a death or glory attempt during a tank shock attack by a vehicle equipped with flechette dischargers, it must first pass an Armour saving throw of 6 before one wound is inflicted.
Decoy Launchers. Decoy launchers are mounted near the engines of Tau skimmers and fire clouds of reflective strips and tiny emitter drones to protect the vulnerable thruster arrays. Whenever a glancing hit result of 4 (immobilised) is rolled against the vehicle, the decoy launchers will force the damage dice to be re-rolled. The decoy launcher can only force one re-roll so the second result stands, even if it is immobilised again.
Disruption Pod. A disruption pod throws out distorting images in both visual and magnetic spectra, making it hard to target at long range. Weapons firing at the vehicle have their range reduced by 6", down to a minimum of 24" or the weapon range if less.
Errata — Chapter Approved: Codex: Tau Q&A (v2.0): A disruption pod does not affect visibility — range and visibility are different things. Check whether you can see the vehicle first, then check that it is in range.
Target Lock. The target lock identifies potential targets and plots fire plans to counter them, granting the vehicle gunner far more choice about the targets to be engaged. Each weapon on the vehicle may fire at a separate enemy unit if desired, subject to the normal line of sight rules.
Seeker Missiles. Seeker missile arrays are provided to allow Tau infantry to immediately obtain fire support. Any model equipped with a markerlight may request a single missile to be launched if they score a hit on the desired target with their markerlight.
Up to four missiles can be fitted to a single vehicle and launched in a single turn if desired, although each needs to be guided by a separate markerlight. Each missile is a one-shot weapon.
The missiles do not need a line of sight from the vehicle they are mounted on to the target, and they hit on a 2+. The missile is assumed to move in a straight line between the model carrying the missile and the target itself for the purposes of deciding whether the shot strikes the front, side or rear. The target may count the benefits of cover they are in or immediately behind.
The vehicle carrying the seeker missiles has no control over them and cannot launch them itself. The mechanism is remote and responds only to markerlight users.
Range: Unlimited. Strength: 8. AP: 3. Heavy 1.