Your next dose of "useless information" maybe? The driver sits front left (normal position for American vehicles) and has a flat weighted hatch cover. The hatch is counter weighted by a spring and there is an open lock latch. Fail to engage the latch and the driver is going to have a headache the first time he stops fast....and it really HURTS! His seat is on an elevation support that can drop the seat bottom to the lowest position with the pull of a handle under the seat. This allows the driver to "dive" down into the compartment if the vehicle comes under fire immediately and get his head below the hatch opening (works like alot of office chairs!). If the up-lock was worn or not fully engaged, you would be tooling along and the driver's head would instantly disappear when the lock let go. This was usually followed by alot of cursing over the intercom between the driver and vehicle commander....you see, the vision ports for the driver were small and hard to see out of. Imagine a 12-ton vehicle cruising along at 35 mph and all of a sudden the driver is disoriented! Another funny thing...the tracks on both sides may not have the same number of links in them. There could be two link differences...and this made the vehicle turn slowly in the direction of the short track without any input. The driver steered by two "lat-bars" or sticks between his legs. They controlled the brakes at the final drive. Pull one bar and the brake was applied to that side...the more you pull, the more brake. To stop straight ahead, pull both bars back evenly. A button on top of the lat-bar locked the bar to the rear (parking brake). Since the brakes were on the drive bogie (toothed wheel at the extreme front) and this bogie did not touch the ground, loosing a track was FUN!!! If the driver paniced, they would pull back on the lat-bars applying the brakes....but one side has no track and is NOT in road contact. The side with the track would brake but the other side would free-wheel on the idler bogies. The result is an instant 90 degree turn in the direction of the good track. If you were doing any speed, this means the vehicle would roll over on her side...or worse onto the roof. Seen it happen once...not a pretty sight.