wow, stealth mode, really? with that big-ass warmachine, every footste-- actually, wait, this could be more of a terror machine, since every invisible, giant footstep may sound as destruction brought about to the enemy.
Whose gonna notice some footseps in a battlefield anyhow, with all those explosions and gunfire all around? The enemy is supposed to be too busy to notice them anyways.
Unless they are supposed to be the forward troops, and then they would kinda... Alert the troops with their steps... Or with their gatlings that rip the spotters in pieces (but would alert the other parts of the said enemy force)