They'll be getting EMALs or the British developed EMCAT, as these just require electricity. This also explains the ISD delay to 2019, as steam catapults could be available a lot sooner. The ships have no provision for steam generation (although adding auxilliary boilers wouldn't be too difficult, the French PA2 variant was scheduled to recieve C-13s and the preliminary design alterations have already been done). Provision for increasing the electrical generating capacity of the CVF's has been included in the design (by an extra 50% I believe), and add to that the weight of the installation of EMALS/EMCAT is expected to be about 25% of the comparable steam catapults as no resovoir or heavy steam pipework are needed.
