?SILVERFAST? superyacht was designed by Silveryachts with an ace under their sleeve: it?s extremely eco-friendly but not setting aside the luxuries associated with a vessel that costs over ?57 million ($88 million) and measures in at 77 meters (252ft) long.

The superyacht can travel from Australia to Europe (a 10,000 nautical miles journey) with just one fuel stop, and it did, a feat near-unprecedented for a large yacht.

In good conditions, Silverfast can cruise at around 20 knots (23 mph) and includes a night-time mode - a "quiet and vibration free" ride, according to Silveryachts - that slows the speed down to 18 knots (20 mph).