In the early 1960s, the 75-mm gun with a muzzle velocity of 1,000 m/s was deemed outdated. The vehicle received the new 90-mm F3 gun that used more powerful HEAT shells. This modernization did not require any significant changes to the turret or vehicle design. The first vehicles were manufactured in February, 1967. The existing vehicles underwent the gun modernization as well.
Time for the successive autoreloading of each shell into the magazine
The improved system allows the time to be decreased for autoreloading the next shell upon firing the loaded shell when the corresponding indicator is displayed
Characteristics are specified for Siege mode.
The technical characteristics are displayed for the charged turbine mode.
Characteristics are specified for Rapid mode.
Reload time of the first and second guns on double-barreled vehicles
Time to repair a damaged main/reserve track
Characteristics are specified for vehicles with crews trained to 100%.