Infantry:
1. Play the SCUBA showcase and observe you can dive and ascend by pointing the mouse up or down and holding W.
2. Start a game of Zeus Game Master, create a diver and remote control him.
3. Swim in water and observe you cannot dive or ascend by holding W and looking in the direction
SDV:
1. Create an SDV in the editor
2. Commandeer the SDV, use Z and X to control your depth
3. Start a game of Zeus Game Master, create an SDV and remote control it, observe you cannot control the depth with Z or X.