The St Francis 50 is the most recent and largest model in the range of catamarans built by St Francis Marine. In every aspect she continues the pedigree - fine styling, seaworthy lines, and a versatility of choice in terms on interior layout. These "trademark" features developed through the St Francis 44 and 48 are now expressed in a high degree of refinement in the St Francis 50. For instance with the greater capacity of the St Francis 50 it is possible to support better on-board systems; the air-conditioning, improved refrigeration, state of the art navigation and communication systems driven by a more powerful gen set.

The designer, Angelo Lavranos, has taken the opportunity to improve on the renowned performance and ease of handling enjoyed by owners of the St Francis 48. The new design offers improved speed, reduced transom immersion and turbulence, plus better motion characteristics, better looks, and more platform space. The additional length of the St Francis 50 also allows for larger and heavier tenders to be carried from the aft davits.