Marksman is a British anti-aircraft weapon system, consisting of a turret, a Marconi Series 400 radar and two Swiss 35 mm Oerlikon autocannons. The system was developed by Marconi and 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, who 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 antiaircraft artillery system, having a documented hit percentage of 52.44%.| T-55AM Marksman | |
|---|---|
| Type | SPAAG |
| Place of origin |  United Kingdom |
| Specifications | |
| Weight | 41 t |
| Crew | 3 (driver, gunner, commander) + back-up crew |
| | |
| Main armament | 2 × 35 mm autocannon 460 fragmentation rounds and 40 anti-tank rounds |
| Secondary armament | 8 × smoke grenade dischargers |
| Engine | V-55 V-12 diesel engine 620 hp (462 kW) |
| Suspension | Torsion bar |
