Hamina-class (Rauma 2000)

The Hamina-class consists of four fast attack craft operated by the Finnish Navy. Developed as the fourth generation of Finnish missile craft, the vessels were built by Aker Finnyards between 1996 and 2006. Initially designated as the Rauma 2000 class, the program's composition was adjusted during development to focus on the Hamina design following a strategic shift in naval requirements.

The vessels utilize an aluminum hull and a reinforced carbon fiber composite superstructure. This composite construction is designed to block radio waves, providing protection against electromagnetic pulses and reducing the escape of internal radio frequency signals. The propulsion system consists of water jets, which enable operation in shallow coastal waters. Stealth features include a hull geometry designed to minimize radar signature, the application of radar-absorbent materials, and a low magnetic field maintained through active cancellation with electromagnets. Thermal signatures are managed by directing exhaust gases either underwater or into the atmosphere. For cooling and decontamination, the ships are equipped with a deck-mounted seawater spraying system. The combat management architecture utilizes commercial off-the-shelf hardware and software running on redundant servers.

The class is homeported at Upinniemi and forms the 7th Surface Warfare Squadron of the Finnish Coastal Fleet. The four vessels—Hamina, Tornio, Hanko, and Pori—underwent a mid-life update between 2018 and 2022. This modernization program included the installation of new combat management systems and sensors, the integration of lightweight anti-submarine torpedoes, and the transition to new anti-ship missile systems. To accommodate the weight of the new systems, the original main gun was replaced with a lighter-weight model. In early 2025, the FNS Pori was assigned to the Standing NATO Maritime Group 1 to monitor underwater infrastructure in the Baltic Sea. The class is expected to remain in service until the mid-2030s.