M4 Series Commander’s Position: Where the Commander did his work.
The commander sat in the back right side of the turret directly behind the gunner. His job was to command the tank. This meant he took the orders from the platoon leader or company commander, and made his tank perform the tasks he’d been given to accomplish the missions he was on. He had the radio in the bustle of the turret to his rear to help him communicate with the rest of the tanks in his unit. To do this he could stand on his seat with his head and shoulders out of the tank, and direct the crew over the intercom. Only he could transmit on the radio, but the others members of the crew could listen. They could all talk to each other on the intercom. On early M4s, when ‘buttoned up’ or when the tank was all closed up with its hatches closed, the commander only had his rotating copula periscope. Later versions of the Sherman had an all-around vision cupola, discussed earlier, that provided a much better view around the tank for the commander. As some of the charts show in the data section, this was the most dangerous crew station. The commander spent a lot of time with his head stuck out, when the rest of the crew was buttoned up, it made him a prime target for basically anyone and anything being shot at the tank.
His job in combat was to call out directions to the driver, and call out targets for the gunner. He had a site vane mounted on the roof of the turret to use outside, by using it and his turret override; he could put the gunner roughly on target by rotating the turret. If he was the platoon leader or company commander, he would be calling out directions to the other tanks and trying to sort out what everyone was doing, and keep things under control, or in the company commanders case as much control as he could over the tanks in his company. He would be depending heavily on the platoon commanders to run their platoons and keep him informed of what was going on.
He was responsible for the tank up to a point, and had to make sure the crew kept up on all the required maintenance to keep the tank in proper running order. He was also responsible for the wellbeing of his crew. The commander was for obvious reasons, the most experienced man in the tank in most cases in most cases, as well. Crews that had that belonged to the platoon, company and battalion commanders were often short a man on tank maintenance, since the officer would be off doing officer stuff, like planning and thinking, sometimes the tanks had a sergeant who stood in for the officer when he wasn’t using the tank as well.
The commander’s position was the only spot open to officers under normal operations. The most common officers would be 2nd lieutenants, and lieutenants as platoon leaders, captains as company commanders and lieutenant colonels as battalion commanders. You might find a major or two in there as well. NCOs of various ranks from the lowly buck sergeant to staff sergeants and maybe higher on rare occasions, would be the enlisted side of the tank commander scale. All the other positions in the tank were filled with lower ranking NCOs or PFCs.