Shared hulls and national weapon fits

Could several allied countries operate versions of the same warship design?

The proposal would probably share a hull, engine arrangement, and broad structure while retaining national differences in weapons fit.

The suggested common design would share its hull architecture and probably its engine arrangement. Participating navies would likely retain differences in weapons fit. Broad structural similarities could therefore coexist with nationally selected equipment. These are expectations for the proposed collaboration, with no settled common specification described.