 Propulsion thrusters are those thrusters that are bigger and more powerful than their maneuvering brothers and whose purpose is to provide adequate locomotion for large vessels as an alternative to traditional propellers.There are a variety of different types of these propulsion thrusters but the most ubiquitous form is the Azimuth thruster, a thruster that can rotate 360 degrees for thrust in any direction the operator desires (Lindborg, 1997).Like all other thrusters, the Azimuth thruster is contained in a tube-like shell that directs the flow of water through the propeller for thrust in one direction based on the position set by the controller.