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Marksman is a British anti-aircraft weapon system developed by Marconi, consisting of a turret, a Marconi Series 400 radar and two Swiss 35 mm Oerlikon autocannons. It is similar to the German Gepard system in terms of engine performance, ammunition carried and effective range of the ammunition. The turret could be adapted to many basic tank chassis, creating a self-propelled anti-aircraft gun (SPAAG). The only operator of the system is the Finnish Army, which ordered 7 units in 1990. The turrets were fitted on Polish T-55AM tank chassis. The system is known as the ItPsv 90 in Finnish service (''Ilmatorjuntapanssarivaunu'' 90, Anti-Aircraft tank 90, the number being the year the tank entered service). It is considered a very accurate anti-aircraft artillery system, having a documented hit percentage of 52.44%.〔(Ilmatorjuntaupseeri: Panssari-ilmatorjuntakoulutus Hämeen Ilmatorjuntapatteristossa )〕 In 2010, the Marksman systems in service in Finland were moved to war-time storage.〔(Helsingin Ilmatorjuntarykmentin ilmatorjuntapanssarivaunut viimeistä kertaa Lohtajan dyyneillä ). Puolustusvoimat, 19 November 2010. 〕 In 2015 work began to install the system on the Leopard 2A4 chassis in order to make up for the loss of mobile anti-aircraft coverage when the Marksman was originally retired.〔(Armeija ottaa vanhojen Marksman-vaunujen tykkitornit uuteen käyttöön ). Helsingin Sanomat, 25 March 2015. 〕 ==Service== Finland has seven ItPsv 90 Marksman anti-aircraft systems, providing low-level air-defense for tank battalions. The SPAAGs are organically tied to the headquarters company and form teams of two. The vehicles have an all-day capacity, and there is also a back-up crew to ensure combat survivability. The ItPsv 90 Marksman is primarily meant to fight helicopters, low-flying aircraft and unmanned aerial vehicles (UAVs). It is also possible to engage surface and armored targets. The chassis of the ItPsv 90 Marksman is a Polish T-55AM tank, which has been modified to fit the turret. The AM version was chosen due to the increased weight of the system (a T55AM weighs 36 tons, while a T-55AM Marksman weighs 41 tons) and the AM has more power (620 hp) than a regular T-55. The weapon system is guided by a British Marconi 400 series frequency agile surveillance and tracking X/J-band radar, which is able to detect targets out to 12 km in search mode and 10 km in tracking mode. The laser distance measure device functions up to 8 km. The commander and the gun operator both have gyro-stabilized optical aiming devices. The armament consists of two Swiss 35 mm Oerlikon anti-aircraft guns, with a rate of fire of 18 rounds per second. The fragmentation round has a muzzle velocity of 1,175 m/s. The effective range is 4,000 meters. The vehicle is also equipped with eight Wegmann 76 mm smoke dischargers, a 7.62 mm assault rifle, and a flare gun. The turret can traverse a full 360 degrees and has an elevation range of −10 to +85 degrees. The magazines hold 460 fragmentation rounds and 40 anti-tank rounds. There are three communication radios in the vehicle for fire guidance and communications. The vehicle is operated by three crew — commander, gunner, and driver. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Marksman anti-aircraft system」の詳細全文を読む スポンサード リンク
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