Hamina type boats were built at the end of the 1990 and the beginning of the 2000. They represent the fourth generation of Finnish rocket boats. All boats are named after Finnish coastal cities.
The first boat was ordered in December 1996, and the fourth became part of the Finnish fleet June 2006 year.
The hull is made of aluminum, and the superstructure is made of reinforced composite carbon fiber. The shape of the vessel was designed specifically to reduce radar visibility. Metal parts are covered with absorbent material.
Fifty nozzles around the deck and superstructures are used to cool the ship to further reduce its visibility. In addition, nozzles can be used to clean a ship that has fallen into the zone of chemical or radioactive contamination.
The main power plant of the Hamina type missile boats consists of two 16V 538 TV93 diesel engines (total power 7550 hp) of the German company MTU, each of which works through a gearbox for two reversible jet propulsion. This allows the use of boats in shallow water, as well as maneuver in narrow straits.
The armament of these rocket boats is based on four container launchers of MTO-85M anti-ship missiles. This rocket was created by the Swedish company SAAB based on RBS-15 Mk2. The main difference from the prototype is an improved turbojet engine, thanks to which the maximum firing range is increased by 50 percent - to 150 km.
In addition, the boat is equipped with a Bofors 57-mm artillery unit, a vertical launch installation on eight Umkonto short-range anti-aircraft missiles of the South African company Denel, as well as two 12,7-mm machine guns. The solution of anti-sabotage tasks is provided by the Elma nine-barrel grenade launcher.
The radio-electronic equipment includes a TRS-3D / I6-ES three-coordinate detection and tracking system for airborne and surface targets (maximum detection range of air targets 90 km), as well as a Zeros 200 firing system with radar, television, thermal imaging stations and a laser rangefinder. The boat is also equipped with a podkilnaya and lowered hydroacoustic stations.
Processing data from the specified radio equipment or external sources, and issuing target designation systems weapons implemented using the automated control system ANCS-2000.