Sorry Boomerang Butt, but the A330 Tech crew rest does convert into a bunk. first you have to move the seat as far forward as it will go, then recline it as flat as it will go, at the same time lowering the armrest. Then you unlatch the section which is along the aft wall it is approximately 1.5 m in length and lock it in, oh don't forget to unlatch the fwd headrest section. The bunk is brilliant and very comfortable.
