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.
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.
CALYPSO is in the top 30% by LOA in the world. She is one of 537 motor yachts in the 40-45m size range.