I was up for some pattern work this summer and this slick eurocopter landed behind me. A search revealed that it's based here:
https://en.wikipedia.org/wiki/Vibrant_Curiosity
From that link:
The yacht has a crew of 26. Her twin MTU diesel engines produce 9,360 hp, good for a top speed of 20 knots, a cruising speed of 17 knots,
My mind was boggled by these stats. (boggling occurs more frequently these days!)
The efficiency of this vessel is quite low. In the Navy I was assigned to a cargo ship, the USS Betelgeuse AK-260. She was a 450 foot long, Victory Ship (Original name: SS Colombia Victory), 455 feet at the water line. Her single screw steam plant produced 8,500 hp which drove her to a cruise speed of 18 knots. Flank speed, also 18 knots. Gross weight 12,000 tons inclusive of max cargo weight 4,000 tons. We burned 50 gallons of NSFO per nautical mile.
So we could cruise as fast as the Vibrant Curiosity while carrying many times the weight in cargo. All with 1940s technology. And much further too. We also had cargo fuel oil tanks which could feed the engine, too.
So why is the Vibrant Curiosity so fuel inefficient?
-Skip