[flir]

Not doubting you, but how is that possible? (A quick, unverified Google throws back "A standard Panamax containership has operational costs of about $9 million per year")

[coffeebeqn]

Also a large private jet uses about 540 gallons of fuel per hour. That’s very roughly $5400/h in air

[Filligree]

Those use cheap diesel.

What sort of fuel do you use underwater?

[detaro]

electricity. which you probably got from cheap diesel in a generator on your carrier ship.