They are likely regular MJ12 Troopers who have received underwater training. Two of them accompany Walton Simons via submersibles to the Ocean Lab in an attempt to kill JC Denton. Two of them can be seen guarding the SoCal SeaWall underwater. One dead is found when escaping the VersaLife UC destruction, carrying flare darts.
They always carry mini-crossbows.
- They are seen wearing rebreathers.
- If the player uses a gas grenade or pepper gun on a diver they will go into a t-pose due to having no animation for rubbing their eyes.