Only One is a 46.3 m / 151′11″ luxury motor yacht. She was built by Baglietto in 2015.
With a beam of 9.5 m and a draft of 2.95 m, she has a steel hull and aluminium superstructure. This adds up to a gross tonnage of 495 tons.
She is powered by Caterpillar engines of 1977 hp each giving her a maximum speed of 16 knots and a cruising speed of 12 knots. Only One's maximum range is estimated at 4500 nautical miles.
The motor yacht can accommodate 12 guests in 6 cabins. The yacht was designed by Francesco Paszkowski.