There are occasions when vehicles will run into the terrain around them, or into another nearby vehicle. In these cases, there are two possible types of collisions: glancing blows (minor collisions) and head-on hits (major collisions). Collisions can be mitigated by ship's or vehicle's defenses.

In the case of a minor collision, all vehicles involved suffer a single Critical Hit (see Vehicle Critical Hits, on page 231). Subtract the vehicle's defense times 10 from the rolled on Table III.2-19: Vehicle Critical Hit Result, on page 230. If the result is reduced to zero or less, the vehicle's shields or other defenses have nullified the collision entirely, and the Critical Hit is canceled.

In the case of a major collision, all vehicles involved suffer a single Critical Hit as well. Subtract the vehicle's defense times 5 from the Critical Hit result. If the result is reduced to zero or less, the Critical Hit is canceled.

At your discretion, some particularly large vehicles might be able to ignore collisions with very small vehicles. However, larger vehicles have a harder time avoiding collisions with terrain features.