IAI Says Its DIAMOND Can Turn One Frigate Into a Small Fleet

Israel Aerospace Industries unveiled DIAMOND, a modular naval combat system meant to raise the offensive and defensive power of frigates a navy already owns, without building new ships. The announcement was made on 20 May 2026.

The system works by putting smaller companion vessels alongside a mother frigate. Those companions carry modular sensor and weapon packages, are controlled remotely, and are fully integrated with the parent ship's radar and fire-control systems, according to the company. DIAMOND is built on a plug-and-play container architecture that allows a ship's capabilities to be reconfigured within hours, and the companion vessels can host loitering munitions, cruise and ballistic missiles, air defence systems and counter-drone technologies. IAI said the concept expands firepower and operational flexibility across maritime missions.

Why navies are interested in containers

The appeal of the idea is arithmetic. A frigate has a fixed number of launch cells and a fixed deck area, and adding to either normally means a new class of ship and a decade of procurement. Distributing payloads onto cheap companion craft, controlled from the frigate, changes what one hull can put in the water on a given day.

Breaking Defense, reporting on the launch, described DIAMOND as a new offering built around networked containerised systems on existing frigates and smaller satellite vessels, and noted that IAI presented it as a concept for operational flexibility and rapid deployment rather than as a system already serving at sea. That distinction matters: an unveiling at this stage is a sales proposition, not a fielded capability.

The company behind it

IAI is Israel's largest aerospace and defence manufacturer and is state-owned. Defense News reported in October 2025 that the company posted $3.22 billion in sales in the first half of 2025, up 13 per cent year on year, with 65 per cent of that generated outside Israel and an order backlog of $25.7 billion at the end of June 2025. Its missile and space systems division was the largest single earner at 46.4 per cent of income, ahead of the Elta electronics arm at 30.7 per cent. The Israeli Ministry of Defense remained its biggest customer, taking 34.6 per cent of output.

Those numbers explain the shape of the pitch. IAI already builds the radars, interceptors and loitering munitions that would sit in the containers; DIAMOND is a way of selling them into hulls that other countries have already paid for.

What Israel's own navy has to defend

Israel's surface fleet is small and heavily tasked. Its four Sa'ar 6 corvettes, built by the German firm Thyssenkrupp, were bought to protect the country's offshore gas fields and shipping lanes. The Times of Israel reported in April 2023 that three of the four had been declared fully operational and the fourth was close to it, and that each displaces about 2,000 tonnes, carries roughly 80 sailors and fields around twenty systems, 18 of them Israeli-made. A fleet that size, guarding fixed installations far offshore, is precisely the customer profile a distributed-payload concept is written for.

What the announcement does not answer

IAI did not say whether DIAMOND has a customer, what it costs, when it might be delivered, or how far development has progressed. The company did not specify how many companion vessels a single frigate would control, how they are crewed or navigated, or how the control link would hold up against jamming. Israel.com has not seen the system demonstrated.