This thesis presents an approach for 1) analyzing Human Machine Interfaces (HMI) for sub-sea robotic Remotely Operated Vehicles (ROV) 2) structurally redesigning its interface modules and 3) evaluating the resulting designs. The thesis exemplifies this process by redesigning the interface modules that pertain to the diagnosing of hardware failures of the propulsion systems of rock dumping ROVs. The redesign focused on providing the user with more situational awareness.