Defense News – Western navies are betting on modularity to keep their fleets relevant in the face of fast-changing technology, according to naval commanders gathered in Paris last week, with an ability to switch out equipment that the Dutch navy chief likened to clipping Lego bricks onto vessels. New naval designs increasingly incorporate containerized payloads, and the commanders of the United States, Italian, Dutch and British navies cited advantages including mission flexibility, quickly getting firepower on the water, and at-sea replenishment.