Even though the VDD 400, with a total weight of 270 tonnes (without utility equipment), is exceptionally light, it is still very powerful and can be used for a drilling depth of up to 5,000 meters.
The materials and selected components as well as the static of the modular rig are specifically adapted for the harsh offshore environment with strong winds and corrosive salt water atmosphere.
For more information on VDD 400 see:
MAX STREICHER successfully tests new offshore rig (Drilling Contractor)
Archer Seeking to Change Industry Mind on Modular Platform Rigs (courtesy of Rigzone)