Nr Fairy
Whether it's a single-engined turbine or single-engined piston, if the one donk fails you're going in the water. There have been previous discussions about turbine / pistion relative reliability, and I'm not going there.
Not quite correct.....have a look at SASless's, Single Vs Twins Thread!!
If you operate and load the Twin in a typical offshore manner [excluding the GOM here] then you have every chance to get a twin back home if you loss one "Donk".