hatch 
Small opening on the turret that the crew uses to enter and leave the tank.
track shoe 
Chain of articulated track runners between the wheels and the ground; it allows the tank to move over uneven terrain.
armor 
Metal covering used to protect against dangers such as light projectiles, shell bursts and radiation.
turret 
Pivoting armored enclosure that houses the tank’s weaponry and aiming devices.
periscopic sight 
Optical device used to target an object separated from the observer by an obstacle.
smoke bomb discharger 
Launching device used to shroud the tank in artificial smoke to conceal a change in its firing position.
gunner’s sight 
Optical device with mirrors used by the gunner to survey the ground ahead from inside the tank.
track link 
One of a series of articulated pieces that forms the track shoe.