Complex sentence: These systems gives the capability to the VST to be autonomous in terms of guide and active optics control, as well as an external guide and wave-front sensor device, provided internally by the focal plane instrument.
Split into simpler sentences: These systems gives the capability to the VST to be autonomous in terms of guide and active optics control. It is also foreseen an external guide and wave-front sensor device, provided internally by the focal plane instrument.