At the leading edge of activity right now in floating liquefaction of natural gas, no more than half a dozen pioneering projects can be described as definitely in the construction stage and on a pretty good path to reaching startup at their target location.

They range from the mighty to the really quite small. And to varying degrees they all owe their existence to roots first put down when gas prices were far rosier than now.

In recent years a good few smallish speculative proposals have briefly inspired optimism, shone brightly, then dissolved in the face of unforgiving market realities.