Just googling around, here is one example.

You may be correct about passenger transport, as long as it is deemed necessary to have the speed of air transport. However, in the future, I suspect that the age-old practice of freight ships taking on paying passengers will become the only practical way of travelling overseas for all but the very wealthy.


Just googling around, here is one example.

Thanks!

Oh, one other point: apparently only 40% of the energy consumed by the QE2 is used for propulsion, the rest is used for hotel power (heating, lighting, etc).  40%!!  That, plus all the added mass per passenger, goes a long way toward explaining the relative inefficiency of transoceanic passenger ship service.