Models may jump over gaps (up to a maximum of 3") and streets, (eg, from the roof of one building to another).
Deduct the distance jumped from the model's movement but remember that you cannot measure the distance before your model jumps. If your model does not have enough movement to jump the distance, it automatically falls. If your model is able to cover the distance, it must pass an Initiative test first or will fall. A model is able to jump over a gap and still fire a missile weapon if it is not running. It may also jump as part of its charge or running move.