1. Place yourself down as a soldier
2. Place an empty AMV-4 Marshall, name it amv
3. Open the console and run: "player moveInCargo [amv, 0]
4. Observe that nothing happens
5. Enter the AMV-4 you placed down as commander
6. Enter into one of the watch fields "(vehicle player) getCargoIndex player"
7. Observe that it returns 0, as if it were the first cargo slot of the vehicle
8. Leave the vehicle and run: "player moveInCargo amv"
9. Observe that nothing happens as commander slot has taken up the cargo index 0 and moveInCargo is unable to move you into it