Impromptu is a 49.9 m / 163′9″ luxury motor yacht. She was built by Trinity Yachts in 2010.
With a beam of 8.5 m and a draft of 2.6 m, she has an aluminium hull and aluminium superstructure. This adds up to a gross tonnage of 490 tons.
She is powered by Caterpillar engines of 2250 hp each giving her a maximum speed of 19 knots and a cruising speed of 16.5 knots.
The motor yacht can accommodate 12 guests in 6 cabins with an interior design by Patrick Knowles and an exterior design by Trinity Yachts .