Allies may share technology without forcing one common hull

The Horizon project brought together navies that wanted common technology but different ships. France and Italy's requirements were close enough for them to build a broadly shared class, while Britain's requirements differed much more. A proposed alternative is to cooperate on equipment and power plants while allowing each navy to choose its own ship arrangement and number of power units. That approach could have made cooperation easier, while leaving each national design responsible for making its systems work together.