"T-1 tank
The driver's observation devices are located in the turret platform. There are two slits in the observation hatch in front of the driver. For observation hatches are located in the corners of the turret platform. The slits in the hatches on the left side are covered with two layer protective glass. There are no slots in the right side. The driver observes through the front slits and the left slit.
The commander observes through the machine gun sight. Outside of battle, he can use the observation ports above the machine guns. Observation ports without slits are located on the sides of the turret. Two observation ports with slits are located in the back of the turret. The location and range of the devices is shown in figure 15. The observation devices do not protect the observer. It is impossible to observe to the right during battle.