Impromptu is a 50.01 m Motor Yacht, built in the United States of America by Trinity Yachts and delivered in 2010. She is one of 9 164 yachts.

Her top speed is 20.0 kn, her cruising speed is 15.0 kn, and she boasts a maximum cruising range of 3816.0 nm at 10.0 kn, with power coming from two Caterpillar diesel engines. She can accommodate up to 12 guests in 6 staterooms, with 9 crew members waiting on their every need. She has a gross tonnage of 490.0 GT and a 8.54 m beam, and she is built with a Teak deck, a Aluminium hull, and Aluminium superstructure.

She was designed by Geoff Van Aller, who has designed 29 other superyachts in the BOATPro database.

The naval architecture was developed by Trinity Yachts, who has developed 47 other superyachts in the BOATPro database, and the interior of the yacht was designed by Patrick Knowles, who has 35 other superyacht interiors designed in the BOATPro database.

Impromptu is in the top 10% by LOA in the world. She is one of 202 motor yachts in the 50-55m size range, and, compared to similarly sized motor yachts, her cruising speed is 1.22 kn above the average, and her top speed 2.89 kn above the average.

Impromptu is registered under the Cayman Islands flag, the 2nd most popular flag state for superyachts with a total of 1562 yachts registered.