The main jet engines are on group 8, so are activated by default.
Group 1 activates the turret movement. Use the left slider for elevation, right slider for rotation.
Group 2 activates the engines for the wheels. Steering is done with the yaw controls.
Group 3 switches on the turret gun, allowing it to fire.
Group 4 activates the steering thrusters for use in water. Steer with the yaw controls.
There is a camera on the turret to give an aiming view along the barrel of the gun.

The Tacruz is a self-propelled gun that has one purpose: To bring the devastating firepower of the turret-mounted railgun to wherever it's needed. It does this by being able to fly, drive and float, using whatever will give it the best chance of destroying its target. To fly, it can take off from land with the aid of a ramp or dip, launching itself into the air and powering into flight with its jet engines. It can also take off from water without any assistance. On land, the 12-wheel drive and steering system gives it good traction and manoeuvrability. It also has the option of activating the jet engines to allow it to climb steep slopes or power across obstacles. On water, power is provided by the jet engines, with steering thrusters to turn the Tacruz.

In combat, this freedom of movement makes the Tacruz an elusive foe, able to strike from anywhere and quickly redeploy before a counter-attack can be launched.