While early thinking had suggested that up to three variants of the ship were to be considered,[12] the concept subsequently evolved into two versions: A 2024 report noted that the main differences between the LRM and FCM versions would encompass the propulsion, sensors, and weaponry configurations.

The FCM variant was to include additional anti-ship missiles and countermeasures against torpedoes and drones.

Key to the design was a modular concept in order to "increase standardisation across European navies, allowing interoperability and adaptability in joint missions and enhancing EU military autonomy in economic, technological, and security domains".

In November 2024, Navantia (Spain), Fincantieri (Italy), and Naval Group (France) signed a consortium agreement for the second phase of the project.

[14][15] The participating member states aim to potentially sign a contract as early as 2025 and expect the keel laying of the first ship to take place in 2026 and delivery to start in 2030.