Honfluer was designed as a pure gas run ferry with electric motors for propulsion , her fueling system was also designed to enable her to be refueled by bringing the LNG onboard in special tanks which are hoisted into position with her own gantry crane and swapping out the empty tanks for full ones . She does not have to berth next to a LNG terminal, just be within a reasonable driving distance from one for the tanks to be replenished , although being next to an LNG terminal would be handy as she can refuel directly from that as well . So if their is a ferry port in Ireland with an LNG tank terminal close by she could be considered, if and when she is completed .