"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.
Basically It depends on how you schedule the service.
You can make buses very efficient if you run them full, however people
already complain that they only get one bus a week.