The T-72B3 is a Russian main battle tank of the T-72 family. The T-72B3 modification was developed as a mass-produced and economical alternative to the main T-90A tank until a new generation of tanks, the T-14, was received by the Armed Forces of the Russian Federation. It is a relatively simple and effective modernization of the T-72B tank, with some parameters brought up to the level of the T-90A or exceeding those in the T-72B3 mod. 2016 (UBKh or T-72B3M).
1) you can fire machine guns at "O"
2) you can go to "B"
3) you can shoot from the cannon at "P"
4) you can stick out the mech-water from the hatch to "I"
5) you can put the commander on "L"