Check out this cool video of the AC-ROV in action...
and here's what they have to say about it...
"The AC-ROV is a full five degrees of freedom underwater video camera and sensor platform. This maneuverability is essential as other underwater inspection vehicles do not have the mobility to work in confined spaces.
4 horizontal thrusters operating together power the AC-ROV forward, back and sideways. Their “vectored” arrangement is like having 4 forward and 4 side, or lateral thrusters. This is the thruster set up on the vast majority of serious commercial ROVs because lateral power and speed is as important as forward power and speed. One is used to get you to the target; the other is for keeping you face onto the target...

