Horizon, radar quality, and destroyer expectations

The Horizon partners pursued tight commonality while disagreeing over how to configure the same systems. Britain wanted destroyer-level worldwide endurance and the ability to sustain the ship comfortably far from home. In this discussion, that distinction concerns operational self-sufficiency rather than resistance to enemy weapons. Britain also wanted a higher-quality radar than the adequate but more economical choices acceptable to France and Italy. The planned British order of twelve ships gave those disagreements an industrial dimension beside French and Italian expectations of four each. Those forces ultimately shrank to six British ships and two each for France and Italy.