Are planes more fuel efficient than ships?

Ships are many times more efficient than cars or airplanes. Efficiency is often measured in gallons consumed to move a ton one mile or similar metrics like Joules per kilogram. In the diagram below, the closer the mode of transportation gets to the top, the worst the efficiency is.



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The aviation industry represents 7.8% of final oil consumption worldwide, while maritime shipping accounts for 6.7%. Consumption by the aviation industry is growing the most rapidly – in fact, up until the early 1980s, it was responsible for less energy use than shipping.

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Flights emit 500 grams of carbon dioxide/metric tons of cargo per kilometer of transportation. However, ships emit only between 10 to 40 grams of carbon dioxide per kilometer. The carbon footprint of airplanes is 20 to 30 times more than ships.

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Flights emit 500 grams of carbon dioxide/metric tons of cargo per kilometer of transportation. However, ships emit only between 10 to 40 grams of carbon dioxide per kilometer. The carbon footprint of airplanes is 20 to 30 times more than ships.

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Oil is the world's largest energy source today. It is the dominant source of energy for the transport sector in particular. This interactive map shows the share of primary energy that comes from oil across the world.

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Comparing the Carbon Footprints of Air and Sea Freight Airfreight generates 47 times more greenhouse gases than ocean shipping, for every ton-mile. While airplanes produce 500g of CO2 per metric ton of freight per kilometer of travel, cargo ships only produce 10-40 grams per kilometer.

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All ship travel benefits The spaces of the ships also allow more freedom of movement but above all comfort: larger armchairs, bed options, TV and video game rooms, bars and restaurants, play areas for children. You can also converse with your travel friends more freely.

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Cruise ships emit more carbon per passenger kilometre than flying, even considering the extra damage that emissions cause at high altitude. It's thought that the Queen Mary II emits 0.43kg of CO2 per passenger mile – that's even worse than the 0.257kg for a long-haul flight.

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Airlines find that fuel dumping can actually be cheaper than not dumping in certain circumstances. But it's not something pilots do on a routine basis. We spoke with Alison Duquette, spokesperson for the Federal Aviation Administration (FAA), who assured us that it doesn't happen very often.

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When an airplane experiences less drag, it consumes less fuel. This relationship between speed and fuel consumption means that flying at a slightly slower speed can result in significant fuel savings for airlines, which in turn can lower operating costs and potentially reduce ticket prices for passengers.

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The tanks are so big that very long distances can be flown. But if the plane would be fully occupied and fully fueled, the maximum take-off weight would be exceeded. In such a case, you have to weigh how much fuel is needed and how many passengers can be transported.

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Meet the most energy-efficient electric, solar cruise ship Its first electric cruise ship, due out in 2030, will combine 60 MWh battery packs with several industry firsts to harness wind and solar while at sea for a truly zero-emission experience.

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During a typical one-week voyage, a large cruise ship (with 3,000 passengers and crew) is estimated to generate 210,000 US gallons (790,000 L) of sewage; 1 million US gallons (3,800 m3) of graywater (wastewater from sinks, showers, and laundries); more than 130 US gallons (490 L) of hazardous wastes; 8 tons of solid ...

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