Но, с другой стороны, смотрим стр. 72:
"When firing a walker’s weapons, pivot the walker on the spot so that its guns are aimed at the target (assume that all weapons mounted on a walker can swivel 45º, like hull-mounted weapons) and then measure the range from the weapon itself and line of sight from the mounting point of the weapon and along its barrel, as normal for vehicles. This pivoting in the Shooting phase does not count as moving and represents the vastly superior agility of walkers in comparison with other vehicles."
Так что, раз "не считается движением", то можно поворачивать даже при иммобиле.