>They have been drilling for oil with unmoored platforms for decades. Indeed, but this is still a rather different scenario. Drilling platforms engaged in dri

>They have been drilling for oil with unmoored platforms for decades. Indeed, but this is still a rather different scenario. Drilling platforms engaged in drilling while under dynamic positioning are doing so under a quite reliable and robus classification, DP3. https://en.wikipedia.org/wiki/Dynamic_positioning#Class_requirements https://en.wikipedia.org/wiki/Dynamic_positioning#Class_requ... These are also manned platforms, having crews and stand-by support vessels to engage in the event something goes wrong. It's also just one vessel with multiple thrusters, not dozens. >Here, the requirements for keeping the rig in a fixed position are quite loose compared to a drilling rig. Good point- the allowable excursions would probably be much greater than for a drilling rig. >The power tether would be quite minimal. Doable, for sure; minimal, I don't quite agree. It's still a complex system. And there's still probably going to be a transmission module for the shore cable. >Also, there is the possibility of creating untethered rigs that store hydrogen locally. Probably not feasible atm. Could be very interesting!