Calypso is a 42.37 m Motor Yacht, built in the United States of America by Ballard and delivered in 1942. She is the only Yms model.
Her top speed is 11.0 kn and her cruising speed is 10.0 kn and her power comes from two Cummins diesel engines. She has a gross tonnage of 282.0 GT and a 7.53 m beam, and she is built with a Pine deck, a Pine hull, and Wood superstructure.
She was designed by Us Navy, who also completed the naval architecture. Us Navy has designed 21 yachts and created the naval architecture for 26 yachts for yachts above 24 metres.
Calypso underwent a full-scale rebuild that finished in 2017.
Calypso is in the top 30% by LOA in the world. She is one of 670 motor yachts in the 40-45m size range.
Calypso is registered under the France flag (along with a total of other 130 yachts).