"dennis@home" wrote in message
...


"Clive George" wrote in message
o.uk...
"dennis@home" wrote in message
...


"Clive George" wrote in message
o.uk...
"Cynic" wrote in message
...
On Fri, 28 Aug 2009 20:20:26 +0100, Cherry Chapstick
wrote:

Ships use so much more fuel per passenger mile that they just don't
come
into the equation.

cite, please

http://en.wikipedia.org/wiki/Fuel_ef...transportation

Spacecraft are potentially the most fuel-efficient mode of transport
in terms of passenger-miles per gallon of fuel.

The ship figure is from a cruise ship. More interesting would be to see
what a ferry uses.

I would expect a ferry to have more drag but they may cram in more
passengers.

And less energy spent on heating, lighting, etc.

Ships are also generally cargo-shifters, not people shifters, so need to
factor that in too. Not easy, is it?

but also totally irrelevant.

You mean irrelevant in a manner that means that a trivial passenger/mile
figure hides the rather more important stuff behind it? Right...