Fire Modes A Tarantula Sentry Gun can fire in one of two ways and you must decide which mode it will be set up in before the start of the game. You cannot change its mode once you have decided, it remains in that mode for the rest of the game.
• Point Defence Mode: The Tarantula Sentry Gun is set up with a fixed firing arc. In this mode, the gun will engage enemy targets up to 36" away that are in a fixed 90° arc to it's front.
• Sentry Mode: The Tarantula Sentry Gun is programmed for close defence and may target enemy models within 18" to which it can draw line of sight and can fire all around itself.
Automated Artillery Unlike standard artillery, Automated Artillery does not require crew in order to function. It is not removed from play due to lack of crew and each Sentry Gun must be destroyed normally before it is removed. Automated Artillery cannot move and cannot charge. If assualted, they do not pile-in and cannot be locked in combat, their attackers will hit automatically, but must roll To Wound normally.
If a unit of Automated Artillery loses an assault, nothing happens - there are no Sweeping Advances, no Pile-ins and no Consolidation moves. The Automated Artillery remains in place and may fire normally in future turns. If the Automated Artillery wins an assault, the enemy must take a Morale check as normal, although the artillery piece cannot Consolidate or make a Sweeping Advance. Independant Characters may not join units of Automated Artillery.
Targeting Which enemy unit within range is the Tarantula Sentry Gun's preferred target is determined by its armament. If no preferred target exists in its line of sight, it will simply attack the nearest target in range.
- A heavy bolter-equipped Tarantula Sentry Gun will fire at the nearest enemy non-Vehicle target according to its firing mode.
- A lascannon or multi-melta equipped Tarantula Sentry Gun will fire at the nearest enemy Vehicle or Monstrous Creature according to its firing mode (note that immobilised vehicles still count as viable targets, only wrecked vehicles will be ignored).
