55-meter Project 'Castor' Floats Out At Heesen Heesen has launched its latest build in the form of the 55-meter Project 'Castor'. The design as you would expect comes from the boards of Frank Laupman of Omega Architects. The interior on this variant of the 55-meter Steel model is by Bannenberg & Rowell. This 55-meter is the fourth hull in this series. Project Castor will be completed in time for delivery in a couple months.